how does ""instant hot"" water in a water cooler work?
Answers
"Instant hot" water in a water cooler typically works through a heating element or a heating tank located inside the cooler.
"Instant hot" water in a water cooler typically works through a heating mechanism integrated within the cooler. The water cooler contains a heating element, often an electric heating coil, which is activated when the hot water button or lever is pressed.
As water flows from the water source into the cooler, it passes through the heating element, where it is rapidly heated to the desired temperature. The heated water is then stored in a hot water tank or reservoir within the cooler, maintaining its temperature until it is dispensed.
When a user requests hot water, the preheated water from the tank is pumped or released through a separate faucet or spout, providing instant hot water for various purposes such as making hot beverages or instant soups. The heating mechanism is equipped with safety features to ensure the water does not reach boiling point to prevent overheating.
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In summary, an electric heating element or a heating coil is used to heat the water in a water cooler with a hot water dispenser. The thermostat regulates the temperature of the water, and a safety feature prevents the water from overheating. That's how "instant hot" water in a water cooler works.
Water coolers, whether countertop or freestanding models, come with features that go beyond merely cooling the water. One of these features is a water heater that produces hot water for coffee, tea, soup, or other hot drinks or foods. To learn more about how the "instant hot" water in a water cooler works, read on.
What is a water cooler?
A water cooler is a device that dispenses cold, room temperature, or hot water. This system is commonly used in offices, schools, or public areas where people need easy access to drinking water. A water cooler typically has two dispensing taps: one for cold water and one for hot water. Both taps are operated with a lever or push button. However, unlike hot water from a faucet, which requires some time to warm up, hot water from a water cooler is usually "instant hot."What makes the water in a water cooler hot?Water coolers with hot water dispensers have a heating element inside the unit that heats the water. There are two types of heating elements used in water coolers: electric heating elements and heating coils.Electric heating elements are common in countertop models, and they work by passing electricity through the element. The element then generates heat, which heats the water in the tank. Heating coils are more common in freestanding models, and they use a tube that is wrapped around the hot water tank. The tube is then heated, and the heat is transferred to the water in the tank.Both types of heating elements have a thermostat that regulates the temperature of the water. When the water cools below the set temperature, the thermostat activates the heating element to heat the water again. In addition, most water coolers have a safety feature that prevents the water from overheating.
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Related Questions
calculate the pressure exerted by a mercury column of 76 cm high at its bottom.Given that density of mercury is 13600kg/m^3 and g=9.8
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Answer:
Explanation:I don't say you have to mark my ans as brainliest but if you think it has really helped you plz don't forget to thank me ...
Determine the mass of precipitate that forms when 125 ml of 0. 222 m aqueous magnesium chloride is mixed with 225 ml of 0. 105 m aqueous sodium phosphate.
Answers
The mass of magnesium phosphate ppt is 2.432 g.
The net ionic equation is:
3MgCl₂ (aq) + 2Na₃(PO₄) (aq) -----> Mg₃(PO₄)₂ (s) + 3Na⁺ (aq) + 3Cl⁻ (aq)
Mass of magnesium chloride = Molar mass × Moles
= 0.125 × 0.222
= 0.02775g
Mass of sodium phosphate = Molar mass × Moles
= 0.225 × 0.105
= 0.023625g
According to reaction stoichiometry, magnesium chloride is the limiting reagent.
So, moles of magnesium phosphate that will be formed = 0.02775/3 = 0.00925
Hence, mass of magnesium phosphate ppt = Moles × Molecular weight
= 0.00925 × 263
= 2.432 g
Therefore, the mass of magnesium phosphate ppt is 2.432 g.
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Assume that at an actual temperature of freezing (0∘C) on a batch of thermometers, the temperatures displayed are normally distributed with a mean of 0∘C and a standard deviation of 1.00∘C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading greater than 0.11 " C if the actual temperature is freezing. The probability of obtaining a reading greater than 0.111∘C is:
Answers
The probability of obtaining a reading greater than 0.11°C from a randomly selected thermometer if the actual temperature is freezing is approximately 0.4562.
To find the probability of obtaining a reading greater than 0.11°C from a randomly selected thermometer if the actual temperature is freezing (0°C), we need to calculate the z-score and use the standard normal distribution.
The z-score formula is given by:
z = (x - μ) / σ
where:
x is the value we want to find the probability for (0.11°C),
μ is the mean of the distribution (0°C),
and σ is the standard deviation of the distribution (1.00°C).
Calculating the z-score:
z = (0.11 - 0) / 1.00
z = 0.11 / 1.00
z = 0.11
Now, we need to find the probability of obtaining a z-score greater than 0.11 from the standard normal distribution. We can look up this probability in a standard normal distribution table or use a calculator.
Using a standard normal distribution table, the probability of obtaining a z-score greater than 0.11 is approximately 0.4562.
Therefore, the probability of obtaining a reading greater than 0.11°C from a randomly selected thermometer if the actual temperature is freezing is approximately 0.4562.
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if a 50 N block is resting on a steel table with a coefficient of static friction
Answers
If F = 37 N, the static frictional force between the block and the table and the minimum force required to move it must be equal.
How is the minimum force of static friction determined?It is the force that regulates itself. The value of static friction varies from zero to the smallest force required to initiate motion. The formula for determining static friction is as follows: Normal Force divided by the static friction coefficient is static friction.
Is weight equivalent to static friction?Although the maximum static friction will rise, the frictional force will always be the same as the weight in mg because friction cannot accelerate an object. Because FrN can take any value less than N to balance the weight, this is the case.
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What happens when you throw a basketball up toward the hoop? If you are lucky, the ball sinks into the net. You score two points before the ball drops down to the ground. The basketball isn’t heavy. Why doesn’t it stay up in the air when you throw it? Have you ever heard the saying, What goes up must come down? This saying helps explain what happens to the basketball. It is being acted on by an invisible force called gravity. Gravity is the force in the universe that attracts all objects to each other.
Gravity has existed since the beginning of the universe. It holds everything in the universe in place. We know it is always there. It is hard to understand how it works. First, you need to understand that there is gravitational attraction between all objects. There is gravitational attraction between you and Earth, between Earth and the Moon, and between Earth and the Sun. You cant feel the gravitational attraction between you and Earth. However, it is what keeps your feet planted firmly on the ground. Imagine spinning around and around on a merry-go-round. As long as you hold on, you will stay on the merry-go-round. Don’t let go! You will fly off and land on the ground. This analogy helps us visualize the gravitational attraction between Earth and you. Earth is spinning on its axis. Gravity keeps you on Earth rather than flying out into space.
Now think about the gravitational attraction between Earth and the Moon. The same force that keeps you on Earth pulls the Moon and Earth together. This attraction keeps the Moon in orbit around Earth. Also think about the affect of the Moons gravitational force on Earths oceans. The gravitational pull of the Moon makes the ocean tides rise and fall.
There is attraction between you and Earth and between the Moon and Earth. The Sun also has a gravitational pull on Earth. This attraction makes the Earth orbit the Sun. The Suns attraction is very strong. All objects in the solar system orbit around this medium-sized star. What would happen if the Suns gravitational attraction suddenly disappeared? All the planets, including Earth, would fly off into space just like you would if you let go of the merry-go-round.
There is gravitational attraction between all objects. Why is the effect stronger in some cases? For example, Earths gravity has a more powerful effect on you than the Suns gravity. How could this be possible? After all, the Suns gravitational attraction holds all of the objects in the solar system. The force of gravity between two objects actually depends on two things. It depends on the mass of the two objects. It also depends on the distances between them. The greater the mass of the objects, the greater the gravitational force between them. In other words, the bigger an object is, the more gravity it has. Distance also has a large effect. The closer objects are to each other, the stronger their gravitational force of attraction. As they get farther apart, the force between them gets weaker. The Sun is much more massive than Earth, but the distance between you and Earth is less. The gravitational pull of the Sun has little effect on you because the distance is so large.
Gravity is the invisible force that attracts all objects, no matter their size or mass. The Sun has the strongest gravitational force of any object in the solar system. It attracts all astronomical objects into orbit around itself. Without this force, everything would fly off into the universe.
Which of the following summaries expresses the main points of the passage best?
Group of answer choices
I believe gravity is the most important aspect of our universe. Without it we would all be floating off into the universe. There wouldn’t be any orbits; instead, all planetary bodies would simply float around, running into each other when they crossed paths and just wandering forever.
There is a gravitational force between all objects in the universe. Gravitational force is what keeps all components of our solar system in orbit around the Sun, as well as moons in orbit around planets. The force of gravity affects Earth's tides and holds us on Earth's surface. The force of gravity between objects depends on their masses and the distance between them.
Gravity is hard to understand and scientists have little to no understanding of how it works. We know that gravity is out there, but the specifics are often lost on us. Plants, animals, and humans are all able to grow tall due to the pull on Earth from the Sun. Without the Sun we would all just stretch out along Earth's surface.
None of the above
Answers
Answer:
What happens when you throw a basketball up
toward the hoop? If you are lucky, the ball sinks
into the net, scoring two points before dropping
back down to the ground. The basketball isn’t
that heavy, so why doesn’t it stay up in the air
when you throw it? Have you ever heard thesaying, “What comes up must come down”?
This saying is a simple explanation for what
causes the basketball to fall back to the ground.
It is being acted on by an invisible force called
gravity, which is the basic force in the universe
that attracts all objects to each other.
1 Gravity has existed since the beginning of the universe. It is hard to understand how or why it
works, but we know it is always there because it holds everything in the universe in place. First,
you need to understand that there is a gravitational attraction between you and Earth, between
Earth and the Moon, and between Earth and the Sun. Even though you can’t feel it, the
gravitational attraction between you and Earth is what keeps your feet planted firmly on the
ground. Imagine spinning around and around on a merry-go-round. As long as you are holding
on, then you stay on the merry-go-round, but if you ever let go, you will fly off and land on the
ground. This is a useful analogy in visualizing the gravitational attraction between Earth and
you. Earth is spinning on its axis and thanks to gravity, you are held to your position on Eart
rather than flying out into space. Explanation: this is what i can do!:)
Answer:
I believe gravity is the most important aspect of our universe. Without it we would all be floating off into the universe. There wouldn’t be any orbits; instead, all planetary bodies would simply float around, running into each other when they crossed paths and just wandering forever.
Explanation:
this is the best match
This passage describes a chemical reaction. Read the passage. Then, answer the question below.
Many chemical factories use the Haber process to make ammonia (NH3). In this process, nitrogen gas (N2) and hydrogen gas (H2) combine at high temperatures and pressures. Ammonia from the Haber process can be used as fertilizer for plants. Fertilizers are made of compounds containing chemical elements such as nitrogen that help plants grow.
In the chemical reaction described in the passage, which of the following are products? Select all that apply.
Hydrogen (H2)
Ammonia (NH3)
Nitrogen (N2)
Answers
In the chemical reaction described in the passage, the product is Ammonia (NH₃)
What is chemical reaction?A chemical reaction is a procedure that causes one group of chemical components to change chemically into another.
Chemical reactions, which can frequently be described by a chemical equation, traditionally include changes that only affect the locations of electrons in the formation and dissolution of chemical bonds between atoms, with no change to the nuclei (no change to the elements present).
The given chemical reaction of chemical factories is:
H₂ + N₂ → NH₃
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What work is done when 3. 5 C is moved through an electric potential difference of 4. 5 V?
Answers
The work done when 3.5 C charge is moved through an electric potential difference of 4.5 V is 15.75 Joules.
Understanding Work Done in Electric CircuitThe Work done when a charge is moved through an electric potential difference can be calculated using the formula below:
Work (W) = charge (Q) * electric potential difference (V)
W = Q * V
Given:
Charge (Q) = 3.5 C
Electric potential difference (V) = 4.5 V
Substituting the values into the equation:
Work (W) = 3.5 C * 4.5 V
Solve for W:
Work (W) = 15.75 J (Joules)
Therefore, the work done when 3.5 C is moved through an electric potential difference of 4.5 V is 15.75 Joules.
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if a capped syringe which is in a warm room is plunged into cold water, in which direction will the syringe piston slide?
Answers
Decrease in pressure creates a net force acting on the piston, which pushes in the direction, piston inward and reduces the volume of the air inside the syringe.
When a capped syringe is plunged into cold water, the air inside the syringe will cool down and its volume will decrease. This change in volume will cause a change in presspistonure inside the syringe, which will cause the syringe piston to move in a particular direction.
Assuming that the temperature of the syringe and the water is initially in equilibrium, the pressure inside the syringe is equal to the atmospheric pressure outside the syringe. When the syringe is plunged into cold water, the air inside the syringe cools down and its volume decreases. This decrease in volume causes a decrease in the pressure inside the syringe, which is now lower than the atmospheric pressure outside the syringe. The result is a net force acting on the piston, which pushes the piston inward and reduces the volume of the air inside the syringe.
To see why this happens, we can use the ideal gas law, which states that the pressure, volume, and temperature of a gas are related by the equation PV = nRT,
\(P_1V_1 = nRT_1\)
\(P_2V_2 = nRT_2\)
here,
\(P_2\) & \(V_2\) are the final pressure and volume of the air inside the syringe.
Since the number of moles of air inside the syringe is constant, we can write:
\(P_1V_1 = P_2V_2\)
If the volume of the air inside the syringe decreases, as it does when the syringe is plunged into cold water, then the pressure inside the syringe must also decrease. This means that the pressure inside the syringe is now lower than the atmospheric pressure outside the syringe. The result is a net force acting on the piston, which pushes the piston inward and reduces the volume of the air inside the syringe.
In summary, when a capped syringe is plunged into cold water, the air inside the syringe cools down and its volume decreases, which causes a decrease in the pressure inside the syringe. This decrease in pressure creates a net force acting on the piston, which pushes the piston inward and reduces the volume of the air inside the syringe.
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Una bebida achocolatada contiene 559 calorías por porción, la persona que la compra desea saber su equivalente en térmias. Por lo tanto, obtine?:
Porfavor ayuda
Answers
Different products have different serving sizes, which could be measured in cups, ounces, grams, pieces, slices, or numbers—such as three crackers. A serving size on a food label may be more or less than the amount you should eat, depending on your age, weight, whether you are male or female, and how active you are. Depending on how much you choose to eat, your portion size may or may not match the serving size.
Spanish one > Una porción es la cantidad de comida que eliges comer a la vez, ya sea en un restaurante, en un paquete o en casa. Una porción, o tamaño de porción, es la cantidad de alimento que se indica en la información nutricional o en la etiqueta de un producto (consulte la Figura 1 a continuación).
Los diferentes productos tienen diferentes tamaños de porción, que se pueden medir en tazas, onzas, gramos, trozos, rebanadas o números, como tres galletas saladas. El tamaño de una porción en la etiqueta de un alimento puede ser mayor o menor que la cantidad que debe comer, dependiendo de su edad, peso, si es hombre o mujer y qué tan activo es. Dependiendo de la cantidad que elija comer, el tamaño de su porción puede o no coincidir con el tamaño de la porción.
buena suerte y tuve que traducir esto
If an object is thrown horizontally, travels with an average x-component of its velocity equal to 5m/s, and does not hit the ground, what will be the x-component of the displacement after 20s?
Answers
Answer:
100 m
Explanation:
5 m/s * 20 s = 100 m
A train travels at a speed of 24 m/s. Then it slows down uniformly at 0.065 m/s² until it stops. What distance does the train travel while slowing down?
Answers
A train travels at a speed of 24 m/s. Then it slows down uniformly at 0.065 m/s² until it stops the distance does the train travel while slowing down are 4430.75 m.
What is distance?Distance measures length. For example, the gap of a street is how lengthy the street is. In the metric gadget of size, the maximum not unusualplace devices of distance are millimeters, centimeters, meters, and kilometers.
It takes 24/.065 = 369.23 sec to slow down to zero.In that point it travels s = half of at^2 = half of (.065)(369.23^2) = 4430.75m.Read more about distance:
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how does the mass of object 1 and object 2 relate to gravitational force
Answers
Answer:
They are directly proportional to gravitational force.
Explanation:
Newton's Law of Gravity states that \(F_G=\frac{Gm_1m_2}{r^{2}}\). The two "m" values are the masses of the objects, r is the distance between their centers, and G is the gravitational constant. Notice how the "m" values are in the fraction's numerator (i.e., on top)? That means increasing even one of the objects' masses will increase the gravitational force. This is known as a direct relationship.
Of course, you could always use the wonderful table provided to solve this! You don't believe what I wrote above? Take on of the two objects' masses, divide the gravitational force by that number, and see what happens. Multiply the two masses together, and see what happens. Prove it for yourself!
I hope this increases your understanding of this concept. Have yourself a wondrous day, 'kay?
A 1.23 x 10^3 kilogram car is traveling east at 25 meters per second. The brakes are applied and the car is brought to rest in 5.00 seconds. Calculate the magnitude of the total impulse applied to the car to bring it to rest. State the direction of impulse applied to the car.
Answers
Answer:
\(\text{Magnitude: }30,000\:\text{Ns},\\\text{Direction: opposite direction of car's movement}}\)
Explanation:
*Edit: The original question states a mass of \(1.23\cdot 10^3\:\text{kg}\). Since the, the poster has corrected it to \(1.20\cdot 10^3\:\text{kg}\) and therefore the answers have been change to account for the typo.
The impulse-momentum theorem states that the impulse on a object is equal to the change in momentum of the object.
Therefore, we have the following equation:
\(F\Delta t=\Delta p\), where \(F\Delta t\) is impulse (another way to find impulse) and \(\Delta p\) is change in momentum.
Because the car is being slowed to a rest, its final velocity will be zero, and therefore its final momentum will also be zero. Since momentum is given as \(p=mv\), the car's change in momentum is \(1.20\cdot 10^3\cdot 25-0=1230\cdot 25=30,000\:\text{kgm/s}\).
As we wrote earlier, this is also equal to the magnitude of impulse on the object. The time it takes to stop the car is actually irrelevant to finding the total impulse. However, if we were to calculated the average applied force on the car, we would need how long it takes to bring it to rest (refer to \(F\Delta t\)).
The direction of the impulse must be exactly opposite to the car's direction, since we are slowing it to a stop.
Therefore, the impulse on the car is \(\boxed{30,750\:\text{Ns, opposite direction of car's movement}}\).
how many times does the iss orbit the earth in one day?
Answers
The space station ISS orbits the Earth approximately every 90 minutes. That is, the space station he orbits the Earth about 16 times in 24 hours a day.
The International Space Station is the largest modular space station in low earth orbit. Five space agencies are involved in this project.
These include NASA in the United States, Roscosmos in Russia, JAXA in Japan, ESA in Europe, and his CSA in Canada. Each orbit takes 90-93 minutes, so there are about 16 orbits per day (24 hours). Depending on the altitude of the ISS, the exact number of orbits per day is usually less than 16 (typically 15.5-15.9 orbits per day).
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An object speeding up, an object slowing down, and an object changing direction are all examples of acceleration.
-True
-False
Answers
When an object is speeding up, the acceleration is in the same direction as the velocity. Thus, this object has a positive acceleration. In Example B, the object is moving in the negative direction (i.e., has a negative velocity) and is slowing down.
In an AC series circuit, the voltage in the inductor differs in phase with the voltage in the capacitor by what angle
Answers
In an AC series circuit, the voltage in the inductor differs in phase with the voltage in the capacitor by an angle of 180 degrees.
What is AC series circuit?In contrast to DC current, which only flows in one direction, alternating current (AC) is an electrical current that periodically reverses direction and varies its value continuously over time.
Resistors, capacitors, and inductors are the primary building blocks of AC circuits.
One characteristic that unites all of these passive electrical components is that they all restrict electric current in a circuit coil, albeit in very different ways.
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in what fundamental respect does electromagnetism break away from the form of materialism associated with the physics of newton and democritus? group of answer choices the electromagnetic force can be felt across a vacuum. newton had thought that the only force in the universe was gravity. the electromagnetic field is physically real, even though it is not made of atoms. nonsense--electromagnetism agrees quite well with newtonian materialism. electromagnetism implies that the future cannot be precisely determined.
Answers
Electromagnetism fundamentally breaks away from the materialism associated with the physics of Newton and Democritus in that the electromagnetic field is physically real, even though it is not made of atoms.
This distinction is significant because both Newtonian physics and Democritus atomism rely on the idea that matter, made up of atoms or other particles, is the primary building block of the universe. Newtonian physics, based on the concept of gravity as the only force in the universe, focuses on the interaction of massive objects and their motion.
Democritus, an ancient Greek philosopher, proposed that the universe was made up of indivisible particles called atoms, which form various materials through their combinations. On the other hand, electromagnetism introduces the concept of electric and magnetic fields, which are not made of material particles or atoms.
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If researchers failed to take into account the effect of air resistance on the pitch, how would it impact their measurements of the efficiency of energy transfer from the arm to the baseball
Answers
The efficiency of energy transfer from the arm to the baseball would be lower than the actual efficiency, as there was a higher initial velocity at release.
In order to answer this question, we must look at the experimental design and assess how air resistance would affect the scientists' computations. The ball's velocity would be reduced as it moved from the mound to home plate, where the velocity was measured, due to air resistance.
Therefore, the measured velocity ought to be lower than the release velocity. As a result of the baseball's predicted energy being lower due to the lowered velocity, the efficiency of the energy transfer from the arm to the ball will also be lower.
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how to calculate how deep an object sinks in water
Answers
Help Please
Energy unit conversions between electron volts (eV) and joules, (J); Einstein's photon energy equation;
Compton's momentum equation;
de Broglie's wavelength equation
Using your knowledge of these equations, quantitatively compare a 3.1 eV photon and a 3.1 eV electron by completing the following data table:
Energy (J)
Rest mass (kg)
Speed (m/s)
Wavelength (m)
Momentum (kg•m/s)
Answers
Answer:
Energy=3.1times 10^-17 J
Rest mass: 6.2 kg
Speed: 47.5 m/s
Wavelength: 2.659 times 10^-6
Momentum: 67.3 kg(m/s)
Explanation:
Which of the following statement/s is/are true? Check all that apply. Jupiter's Great Red Spot is in the southern hemisphere of the planet The fastest wind speed recorded in our solar system is on the dwarf planet Pluto Neptune's Great dark spot is in the northern hemisphere of the planet Water geyser is located on the South Pole of Saturn's Moon Enceladus The Hexagon hurricane is on the North Pole of the planet Uranus
Answers
The true statements are:Jupiter's Great Red Spot is in the southern hemisphere.The fastest wind speed recorded in our solar system is on Neptune.
Among the given statements, only two are true. Jupiter's Great Red Spot, a massive storm, is indeed located in the southern hemisphere of the planet. The Great Red Spot is a prominent feature on Jupiter, visible as a giant swirling storm system. On the other hand, the fastest wind speed recorded in our solar system, reaching speeds of up to 2,100 kilometers per hour (1,300 miles per hour), is found on Neptune.
The strong winds on Neptune contribute to its dynamic atmosphere and the formation of features like the Great Dark Spot. The remaining statements about Pluto, Saturn's moon Enceladus, and Uranus are not true according to our current understanding.
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A vector has an x-component of length 3.5 and a y-component of length 3. What is the angle of the vector?
Answers
If a vector has an x-component of length 3.5 and a y-component of length 3,then the angle of the vector would be 40.6°.
What are trigonometric functions?A right-angled triangle's side ratios are the easiest way to express a function of an arc or angle, such as the sine, cosine, tangent, cotangent, secant, or cosecant. These functions are known as trigonometric functions.
As given in the problem ,if a vector has an x-component of length 3.5 and a y-component of length 3,
Let us assume the magnitude of the vector is A.
The x component of the vector is given by Acosθ and the y component of the vector would be given by Asinθ,
Tanθ = Asinθ / Acosθ
=3 / 3.5
= Tan ⁻¹(0.857)
θ = 40.6°
Thus, the angle of the vector would be 40.6° .
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Anyone know the answer to number 4…..please help me ASAP!
Answers
Answer:
All planets have an elliptical orbit
all planets have roughly the same SHAPE of orbit
What is gravitational force??
Answers
Answer:
the force of attraction between all masses in the universe
Explanation:
Have a nice day :)
a) The mass of a box is 250 kg. The lower surface area is 150 cm². What is the pressure exerted by the box on the surface?
Answers
\(\\ \sf\longmapsto Force=ma=250(10)=2500N\)
Area=150cm^2=0.015m^2\(\\ \sf\longmapsto Pressure=\dfrac{Force}{Area}\)
\(\\ \sf\longmapsto Pressure=\dfrac{2500}{0.015}=1.6666.6Pa\)
Find the mass of a car that is travelling at a velocity of 60 m/s North. The car has 6, 025, 000 J of kinetic energy.
Answers
For this problem, lets use the kinetic energy formula
\(KE=\frac{1}{2}mv^2\)Where m is equal to mass and v is equal to velocity
In our given, we have:
velocity = 60 m/s
kinetic energy = 6,025,000 J
Plug these numbers into the formula to get the mass
\(6,025,000=\frac{1}{2}m(60)^2\)\(\frac{6025000}{60^2}=\frac{1}{2}m\)\(1673.611=\frac{1}{2}m\)m = 3347.222 kg
the weight of a person is 400N. he exerts 400N/m² pressure if he stands with both feet. Find the area of the floor covered by his both feet.
Answers
Answer:
1 m²Explanation:
The area of the floor covered by his both feet can be found by using the formula
\(a = \frac{f}{p} \\ \)
f is the force
p is the pressure
From the question we have
\(a = \frac{400}{400} = 1 \\ \)
We have the final answer as
1 m²Hope this helps you
If you combine the relevant equations (Maxwell’s equations, continuity equation for electrons, force equation on electrons) when a magnetic field is present in the zero-order state, one ends up with the following dispersion relation: ωω^2ₚ= ω ∓ ωc) (ω²-k²c²), where ω²ₚ=4πnₑe²/mₑ is the plasma oscillation frequency and ωc=eB₀/mₑc is the electron cyclotron frequency. Note that cgs units are assumed, so e = 4.803 x 10⁻¹⁰ esu. The (or +) sign denotes waves propagating in the direction of the magnetic field (or in the opposite direction).
For ‘typical’ conditions, what are the numerical values of the plasma and cyclotron frequencies? Assume the Earth’s magnetic field is B₀=0.5G (gauss are the cgs units of magnetic field strength) and assume an electron density like that in the ionosphere, nₑ~10⁶ cm⁻³.
If we assume no zero-order magnetic field (B₀=0), what does the dispersion relation reduce to? (Write as a function of .)
In that B₀=0 case, take your expression for ω as a function of k, and derive the formula for the phase velocity v∅= ω/k as a function of ω. Make a graph of v∅ vs ω.
Similarly, for the B₀=0case, find a formula for the group velocity vg= ∂ω/∂k as a function of ω and graph it.
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The plasma oscillation frequency and electron cyclotron frequency are two types of frequencies that affect the propagation of electromagnetic waves in plasma. Plasma can conduct electromagnetic waves and allow them to propagate, although the properties of these waves are different from those in a vacuum.
The numerical values of the plasma and cyclotron frequencies for typical conditions can be calculated using the given formulas, which are:ω²p= 4πne²/me and ωc=eB₀/me, where B₀ is the strength of the magnetic field (0.5 G) and ne is the electron density (10⁶ cm⁻³).
Substituting these values,ωp= 1.408 x 10⁸ rad/sωc= 2.799 x 10³ rad/s.
The dispersion relation ω²= ω²p ± ωc(ω² - k²c²) holds true when a zero-order magnetic field is present. If the magnetic field is removed, B₀=0, the dispersion relation reduces toω²= ω²p ± ωL(ω² - k²v²), where ωL is the Langmuir frequency and v is the electron thermal speed, which can be approximated as 10⁵ m/s for typical conditions.
As a result, the phase velocity v∅ = ω/k is given by v∅= (c² + v²)/(ω² - ω²L)⁰.⁵, which can be plotted against ω as shown below. Group velocity, on the other hand, is given by the derivative ∂ω/∂k and is shown in the graph below.
Group velocity decreases with frequency, implying that high-frequency waves travel slower than low-frequency waves.
Learn more about cyclotron frequencies here ;
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Why is it important to be careful interpreting absolute ages of clastic sedimentary rocks such as sandstones?
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Answer:
You need to be careful when finding the true age of sedimentary rocks to understand its full history.
Explanation:
Explain how is the voltage across a resistor measured?
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Answer:
You take the basic formula of E = I x R, solve for R -> R = E / I. In other words, take the required voltage drop (in volts) and divide by the current (in amps) in the resistor and determine the resistance (R) in ohms.
Explanation: hope this helps