Which of the following is an example of potential energy?
a) a river flowing down a canyon
b) energy in a hamburger
c) a person riding a bike for 20 miles
d) swinging a golf club

The time taken for the stick that the bird dropped to reach the ground is 3.96 seconds.

The time taken for the stick that the bird dropped to reach the ground is determined the using formula below:

h = ut + ¹/₂ * g * t²

where the given parameters are given below:

h = 77.0 meters

u = 0

t = ?

g = 9.81 m/s²

Solving for the time required:

77.0 = 0 * t + ¹/₂ * 9.81 * t²

t² = 77.0 * 2 / 9.81

t² = √15.7

t = 3.96 seconds

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(a) the energy in joules of an x-ray photon with wavelength 3.30 ✕ 10−10 m is 6.03 x 10^-16 J.

(b) Convert the energy to electron volts = 3.75 keV

(c) If more penetrating x-rays are desired, should the wavelength be increased or decreased?  decreased

(d) Should the frequency be increased or decreased?   increased

(a) The energy in joules of an x-ray photon with wavelength of 3.30 x 10^-10 m can be calculated using the Planck's equation:

Planck's equation is given by:

E = hf

Where, E = Energy of a photon in Joules h = Planck's constant f = Frequency of the electromagnetic radiation λ = Wavelength of the electromagnetic radiation

Since the question provides the wavelength, we need to calculate the frequency of the electromagnetic radiation.

h = 6.626 x 10^-34 Js, and λ = 3.30 x 10^-10 m

Thus, f = c/λ, where c is the speed of light and is given by c = 3.0 x 10^8 m/s.

Therefore, f = 3 x 10^8/3.30 x 10^-10 = 9.09 x 10^17 Hz

Now, we can calculate the energy of the x-ray photon using Planck's equation.

E = hf = 6.626 x 10^-34 J s × 9.09 × 10^17 Hz= 6.03 x 10^-16 J

Therefore, the energy of the x-ray photon is 6.03 x 10^-16 J.

(b) The energy can be converted to electron volts using the equation:

1 eV = 1.602 x 10^-19 J

Thus, 6.03 x 10^-16 J = 6.03 x 10^-16 / (1.602 x 10^-19) eV = 3753 eV ≈ 3.75 keV

Therefore, the energy of the x-ray photon is approximately 3.75 keV.

(c) If more penetrating x-rays are desired, the wavelength should be decreased. This is because the energy of the x-ray photon is inversely proportional to the wavelength. As the wavelength decreases, the energy of the x-ray photon increases. This means that shorter wavelength x-rays are more energetic and can penetrate more deeply into materials.

(d) The frequency should be increased. This is because the energy of the x-ray photon is directly proportional to the frequency. As the frequency increases, the energy of the x-ray photon increases. Therefore, x-rays with higher frequencies are more energetic and can penetrate more deeply into materials.

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Answer:

Option (d) is correct.

Explanation:

Work done is given by :

W = Fd, where F is force and d is displacement

Unit of work done :

The SI unit of force is Newton (N) and that of displacement is meter (m). So, the unit of work done is N-m. It is call Joule. It means that the unit of work done is Joule.

Power is given by rate at which the work is done. It is given by :

P = W/t, W is work done and t is time

Unit of power:

Unit of work is Joule (J) and that of time is second (s). It means that the unit of power is Watt and it is equal to Joule/second

Hence, the correct option is (d) "The unit for work is a joule. The unit for power is a watt, which is a joule per second".

Answer: The unit for work is a joule. The unit for power is a watt, which is a joule per second.

Explanation:

Answer:

8.37757

Explanation:

may i have brainliest

Answer:

The speed of a wave (v) is equal to the product of its wavelength (λ) and frequency (f), i.e., v = λf. Rearranging this equation, we get:

λ = v/f

Substituting the given values, we get:

λ = 2.3 m/s / 5 Hz

λ = 0.46 meters

Therefore, the wavelength of the water wave is 0.46 meters.

Explanation:

Answer:

The wavelength is 0.46 meters.

Explanation:

The speed of a wave is given by the formula:

v = λf

where v is the wave speed, λ is the wavelength, and f is the frequency.

We are given v = 2.3 m/s and f = 5 Hz. Rearranging the formula above to solve for λ, we get:

λ = v/f

Substituting the given values, we get:

λ = 2.3 m/s / 5 Hz = 0.46 m

Therefore, the wavelength of the water wave is 0.46 meters.

The unmanned SpaceX rocket that exploded minutes after taking off was launched from Cape Canaveral, Florida, which is located in the United States.

An unmanned SpaceX rocket, known as the Falcon 9, exploded a few minutes after its launch from the Cape Canaveral Space Launch Complex in Florida, United States. The incident occurred on [date]. The rocket was carrying [payload information] and was intended for [mission objective].

The explosion took place during the ascent phase of the rocket's flight, resulting in a catastrophic failure. The exact cause of the explosion is typically investigated by SpaceX and relevant authorities to determine the root cause, which could range from technical malfunctions to operational errors.

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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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Answer:

FN=-Fg -> Fg=mg -> Fg = 238 kg*9.8 m/s^2 ->

Fg = -2432.4 so FN = 2432.4 -> FF = μs*FN ->

FF = 0.22*2332.4 N -> FF = 513.128 ->

Fapplied > 513.128 N

Explanation:

...

Answer:

well..

Explanation:

Liquid can flow but solid cannot because of differences in their properties

property of liquid which lets it flow:

property of solid which tends to obstruct flow:

Hope this helps!

The momentum of the ostrich with mass 163 kg at velocity 14m/s would be 2282 kg·m/s

Momentum is characterized as the intensity of a body's motion. As momentum depends on both velocity and the direction of the body's motion, it is quantified by "mass velocity". Since velocity is a vector and mass is a scalar, momentum is a vector quantity. Mass times speed equals momentum.

p = m*v

= 163*14

= 2482 kgm/s

Although these physical variables are comparable, force and momentum differ from one another. Whether it is a pulling or pushing movement, force is often the outside influence acting on a body. The quantity of motion within a moving body is represented by momentum, on the other hand.

"The motion of an item equal to the product of its mass and its velocity" is referred to as momentum. When we say anything has momentum, we are referring to its precise mass and direction of motion.

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Answer: D

Explanation:

It is at organ level because the kidney is an organ

Answer:

The answer is 5.0 m/s

Explanation:

(Hope this helps can I pls have brainlist (crown)☺️)

Answer:

c

Explanation:

I think but if I'm wrong I'm sorry

Answer:

i think its float

Explanation:

Answer:

2.5m/s^2

Explanation:

a=velocity/time

a=25m/s/10s

a=2.5m/s^2

If an object is thrown straight up and air resistance is negligible, then its speed when it returns to the starting point is the same as when it was released. If air resistance were not negligible, then its speed upon return would be less than its initial speed.

Air resistance is the frictional force that opposes the motion of an object as it moves through the air. The resistance of the air has an effect on the speed and direction of the object. This frictional force is the result of the collision of the object with air molecules.The resistance force is proportional to the square of the object's speed as it moves through the air. As the object moves faster, the resistance force becomes greater, which opposes its motion. If the object moves slowly, the resistance force becomes less because there is less kinetic energy to dissipate.

Therefore, if air resistance were not negligible, the speed of the object upon its return would be less than its initial speed. In fact, the object's speed would be reduced continuously during its ascent. When the object reaches its highest point, it would have zero speed momentarily, and then it would begin to accelerate downward. The air resistance would continue to oppose its motion as it fell back to the ground. In conclusion, the main answer to the question is the speed of the object upon its return would be less than its initial speed.

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Answer:

Summary notes really help and make sure to revise on past papers.Good luck

Explanation:

Give me a like if this helped

Answer:

B

Explanation:

The question does not specify any outside forces that could slow down the ball horizontally. There fore the ball does not accelerate or decelerate horizontally. Therefore,  a = 0m/s2

Answer:

Explanation:

There are three states of matter; solid, liquid and gaseous states.

The solid state of matter has it's particles tightly packed with very restricted  or no movement within the molecule hence the reason for it's definite shape.

The liquid state of matter has it's particles with a free movement (better than solid but not as free as gases) within the molecule hence it's particles are loosely packed within the molecule. Hence, they (liquids) assume the shape of the container in which they are stored and they move freely when released from the container.

The gaseous state of matter has it's particles totally loosely packed as a result of it's particles moving freely and colliding against one another.

Thus, we can use the above descriptions to answer the statements from the question.

1) The atoms in a  ----- are closely packed, but able to slide past each other. Answer: From the description above, it can be deduced that the atoms here are in a solid because the particles within a solid are closely packed.

2) The atoms in a  -------- spread as far apart as possible.

Answer: The atoms here are in gaseous form because, as described earlier, they are loosely packed and  can thus be as far apart as possible.

3) A  ----- has a definite shape and volume.

Answer: As described earlier, a solid substance would have a definite shape and volume because it's particles are tightly packed.

4) The shape of a  ----- can change, but the volume is definite.

Answer: The substance here is a liquid because the particles are free (but not as free as gases) and would have a definite volume but will assume the shape of the any container they are placed in (hence they have an irregular shape).

Answer:

The atoms in a

✔ liquid

are closely packed, but able to slide past each other.

The atoms in a

✔ gas

spread as far apart as possible.

A

✔ solid

has a definite shape and volume.

The shape of a

✔ liquid

can change, but the volume is definite.

Explanation:

Answer:

Ofc! Uhm, The cause of that increase would be (C) As it rises.

Explanation:

I hope this helped a little- I'm sure that I won't be 100% correct as it is 11 pm for me, haha. Nya~ good luck on the test!

In order to find how far in front of the cattle should the pilot release the hay so that the bales will land at the point where the cattle are stranded, we need to determine the horizontal distance the bales travel from their release point to the point of landing.

We can solve for the time it takes the bales to reach the ground using the vertical component of the plane's velocity and the equation of motion for constant acceleration in the y-direction:y = yo + voyt + 1/2gt^2where y is the final position in the y-direction, yo is the initial position in the y-direction, voy is the initial velocity in the y-direction, t is time, and g is acceleration due to gravity.

For this problem,y = -160 m (the final position of the bales is at the level of the ground, which is below the release point)yo = 0 (the initial position of the bales is at the release point)voy = (60.0 m/s)sin45.0 = 42.4 m/st = ?We can solve for t by rearranging the equation to:t = (-voy ± √(voy² - 2g(y - yo))) / gThe quadratic formula was used to obtain this equation.

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If you move two charges four times closer together, the electric force between them will increase by a factor of 16. The electric force between two charges is given by Coulomb's law, which states that the force is proportional to the product of the charges and inversely proportional to the square of the distance between them.

Mathematically, F = k*q1*q2/r^2, where F is the electric force, k is the Coulomb's constant, q1 and q2 are the charges, and r is the distance between them. If the distance between the charges is reduced by a factor of 4, then the denominator in the above equation becomes 1/16th of its original value. Thus, the electric force between the charges will increase by a factor of (1/1/16) = 16. Therefore, if you move two charges four times closer together, the electric force between them will increase by a factor of 16. If you move two charges four times closer together, the electric force between them will increase by a factor of 16.

According to Coulomb's Law, the electric force (F) between two charges (q1 and q2) is given by the equation, F = k * (q1 * q2) / r^2, where k is Coulomb's constant, and r is the distance between the charges. When you move the charges four times closer together, you are reducing the distance (r) by a factor of 4. So, the new distance between the charges is r/4. Now let's calculate the new electric force (F'), F' = k * (q1 * q2) / (r/4)^2, F' = k * (q1 * q2) / (r^2 / 16), F' = 16 * (k * (q1 * q2) / r^2). Since the initial electric force was F = k * (q1 * q2) / r^2, you can see that the new electric force (F') is 16 times greater than the initial force (F).

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The smallest, electrically neutral assemblage of energy and matter that we know exists in the universe. it consists of a nucleus surrounded by a cloud of electrons is: an atom

The smallest unit of an element that still retains the distinctive behavior of that element is an: atom

A single atom of an element keep its distinctive behavior, that's because the atom is the smallest unit of the composition of a chemical element

The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.

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Answer:

A) Sue is lifting the bucket by a force of 49.035 newtons.

B) The bucket has an acceleration of 8.207 meters per square second on the Moon.

Explanation:

A) According to the First Newton's Law, a system is at equilibrium when it is either at rest or travelling at constant velocity. In this case, Sue must exert an external force on the bucket, whose magnitude is equal to the weight of the bucket but direction is opposed to it. By Second Newton's Law, we find that:

\(\Sigma F = F - m\cdot g = 0\) (1)

Where:

\(F\) - Lifting force, measured in newtons.

\(m\) - Mass of the bucket, measured in kilograms.

\(g\) - Gravitational acceleration, measured in meters per square second.

If we know that \(m = 5\,kg\) and \(g = 9.807\,\frac{m}{s^{2}}\), then the lifting force is:

\(F = m\cdot g\)

\(F = (5\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\)

\(F = 49.035\,N\)

Sue is lifting the bucket by a force of 49.035 newtons.

B) By the Second Newton's Law, we have the following model:

\(\Sigma F = F-m\cdot g = m\cdot a\) (2)

Where \(a\) is the net acceleration of the bucket, measured in meters per square second.

If we know that \(F = 49.035\,N\), \(m = 5\,kg\) and \(g = 1.6\,\frac{m}{s^{2}}\), then the net acceleration of the bucket is:

\(a = \frac{F}{m} -g\)

\(a = \frac{49.035\,N}{5\,kg}-1.6\,\frac{m}{s^{2}}\)

\(a = 8.207\,\frac{m}{s^{2}}\)

The bucket has an acceleration of 8.207 meters per square second on the Moon.

(a) The force applied by Sue in lifting the bucket at a constant velocity is 49 N.

(b) The acceleration of the bucket when lifted on the moon is 8.2 m/s².

The given parameters;

The force applied by Sue in lifting the bucket at a constant velocity is calculated as;

\(F = m(a + g)\)

\(F= mg\\\\F = 5 \times 9.8\\\\F = 49 \ N\)

The acceleration of the bucket when lifted on the moon with the calculated force is;

\(F = m(a + g)\\\\a+g = \frac{F}{m} \\\\a = \frac{F}{m} - g\\\\a = \frac{49}{5} - 1.6\\\\a = 8.2 \ m/s^2\)

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Answer:

the answer is 352.8m

Explanation:

Since the gravitational constant is denoted as g

\(g = 9.8 \: \frac{m}{ {s}^{2} }\)

and the ball needed 6 seconds to land, so we can calculate the height of the building as:

\(h = 9.8 \: \frac{m}{ {s}^{2} } \times {(6s)}^{2} = 9.8 \: \frac{m}{ {s}^{2} } \times 36 {s}^{2} = 352.8m\)

Answer:

Mixture C (salt and sugar)

Explanation:

Both salt and sugar can dissolve in water. And you can't just separate the mixture by filtering it like you could in the other mixtures.

Answer:

A

Explanation:

Because plants cant move and animals can.

The characteristic which describes an organism of kingdom Animalia is able to move on its own when compared to the plants kingdom. Thus, the correct option is A.

Animals are the multicellular, eukaryotic organisms in the biological kingdom Animalia. Animals are the organisms which consume organic material, breathe oxygen gas, are able to move on their own, can reproduce sexually and produce organisms which contain genetic information which is recombination of both the parents, and these organisms go through an ontogenetic stage in which their body consists of a hollow sphere of the cells, the blastula, during the embryonic development of organisms.

Organisms belong to Animal kingdom show some characteristics which are not found in the organisms which belong to the plant kingdom including movement. Animals can move on their own while plants cannot.

Therefore, the correct option is A.

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With the sound waves in phase at 688 hz and the speed of sound in air to be 344 m/s we have a wavelength of 0.5 m

To solve this problem the formula and the procedure that we have to use is:

λ = v / f

Where:

Information about the problem:

Using the wavelength formula and replacing values we get:

λ = v / f

λ = 344 m/s / 688 Hz

λ =0.5 m

It is the quantity that measures the number of times or cycles in which a wave is repeated over time in seconds. Frequency is expressed in Hertz (Hz).

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The object's centripetal acceleration will be halved if the size of the ring route is doubled while maintaining a constant radial velocity.

Thus, velocity is measured in metres per second, or m/s. The metric speed unit is the metre per s (m/s). A different way to describe velocity magnitude is in centimeters per second (cm/s).

Velocity is the pace and orientation of an item's movement, whereas pace is the forecasting which a thing is travelling along a route. In other words, velocity is a vector, whereas speed is a scalar number.

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Answer:

pressure is equals to F/A tge answer is 5pa