A tennis ball is struck and departs from the racket horizontally with a speed of 28.0 m/s. The ball hits the court at a horizontal distance of 20.5 m from the racket. How far above the court is the tennis ball when it leaves the racket

By conversion unit, the length in meters of green light wavelength is 5 x 10¯⁷ m.

We need to know about a conversion unit to solve this problem. Meter is the SI unit for length but there are other units which able to determine the length such as nanometer. The conversion unit of nanometer to meter is

1 nm = 10¯⁹ m

From the question above, we know that the wavelength of green is 500 nanometers. in a meter, we can write as

500 nm = 500 x 10¯⁹ m

500 nm = 5 x 10¯⁷ m

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It's important to know that nuclear fusion consists of two nuclei with low mass numbers combining to form a single nucleus with higher mass numbers. On the other hand, nuclear fission is about the opposite phenomena because the atom splits, releasing a great amount of energy.

Gliders are propelled along an air track by a force. The \s200

The g spring is crushed between the gliders. How much pressure does the spring put on gliders A and B?

Glider A weighs 400g.

Glider B's weight is 600g

There is very little friction as the gliders are on the track. As a result, everything accelerates continuously.

replacing the specified data in the equation

Changing the value of the equation to reflect the provided data

The spring's force on glider A is directed in the opposite direction from the outside force

Apply the knowledge (part b) The gliders are on the air track, and there is little friction.

B's right glider's mass,

right spring mass, outside force. There is very little friction as the gliders are on the track. As a result, everything accelerates continuously.

This force is a result of the glider B's spring.

replacing the specified data in the equation

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The answer is heat flow.

When two systems in contact are not at the same temperature, heat flow occurs.

What is heat flow?

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Answer:

Explanation:

When two systems in contact are not at the same temperature, Heat flow occurs.

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What is the force per meter (in N/m) on a lightning bolt at the equator that carries 19,330 A perpendicular to the Earth's 3.00×10^-5T field?

The force per meter on a lightning bolt at the equator that carries 19,330 A perpendicular to the Earth's 3.00×10^-5T field is given by the formula: F = IℓBsinθWhere:F is the force in newtons (N)I is the current in amperes (A)ℓ is the length of the conductor in meters (m)B is the magnetic field in tesla s (T)θ is the angle between the current and the magnetic field, and since it is perpendicular, then θ = 90°ℓ = 1 meter, I = 19,330 A, B = 3.00×10^-5 T, and θ = 90°

Substituting the given values: F = IℓBsinθ= (19,330 A)(1 m)(3.00×10^-5 T)sin(90°)= 0.5799 N/m

Therefore, the force per meter on a lightning bolt at the equator that carries 19,330 A perpendicular to the Earth's 3.00×10^-5 T field is 0.5799 N/m.

What is the direction of the force if the current is straight up and the Earth's field direction is due north, parallel to the ground?

The direction of the force is given by Fleming's left-hand rule (also called the motor rule), which states that if the thumb, first finger, and middle finger of the left hand are held mutually perpendicular to each other with the first finger pointing in the direction of the magnetic field and the thumb in the direction of the current, then the second finger points in the direction of the force exerted on the conductor by the magnetic field. Hence, for a current that is straight up and a magnetic field that is parallel to the ground towards the north, the force will be directed towards the west

Therefore, the direction of the force is towards the west.

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Answer:

80%

Explanation:

Energy Input: 360 J

Energy Output: 288 J

e= 288/360 × 100

e= 80%

Alternatively,

e= W(total)/ Q (in)

e= 288/360

e=0.8×100

e=80%

If a machine produces electric power directly from sunlight, then it is Photovoltaic (PV).

Explanation: Photovoltaic (PV) refers to the process of converting sunlight into electricity. PV technology uses silicon cells to absorb photons (particles of light) to release electrons. It is also known as solar cells. Solar cells, also known as photovoltaic cells, are usually made of silicon and convert the light energy of the sun directly into electrical energy. A group of solar cells forms a solar panel, which can be used to generate electricity from the sun's energy, while a group of solar panels forms a solar array.

Thus, photovoltaic cells are the best answer for the given question.

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C. The metal and the plastic allow electricity to flow through the wire easily.

A conductor is a material that allows electricity to flow through it easily, with little resistance. Conductors are typically made of metal, such as copper or aluminum, and are used in electrical wires to transmit electrical signals and power.

The thin metallic wires inside the plastic covering are usually made of a conductor, such as copper or aluminum, which allow electricity to flow through them easily. The plastic covering, or insulation, protects the metal wires from touching each other and short-circuiting, which can cause electrical hazards, such as fires or shocks. The plastic also helps to keep the metal wires in place and protected from physical damage.

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Answer:

Electrical energy

Explanation:

Electrical energy deals with magnetism and moving electrons

Answer: you are electrical energy

Explanation:

The 11 W device is likely to burn out when the switch is turned on, due to the higher voltage it will be subjected to compared to its rated voltage. It is important to ensure that the devices used in a circuit have the appropriate voltage rating to avoid damage or failure.

When two devices with different power ratings are connected in series, the voltage across each device is divided according to their power ratings. In this case, the two devices are rated 22 W and 11 W, respectively, and are connected in series across 440 V mains. The voltage across each device can be calculated using the formula V = P/I, where V is the voltage, P is the power rating, and I is the current.

For the 22 W device, the voltage across it is V = P/I = 22/0.1 = 220 V. For the 11 W device, the voltage across it is V = P/I = 11/0.1 = 110 V. Therefore, the 22 W device has a voltage rating of 220 V, which is the same as the voltage of the mains, and the 11 W device has a voltage rating of 110 V.

When the switch is turned on, the voltage across the two devices will be the same, which is 220 V. Therefore, the 22 W device will operate normally, but the 11 W device will be subjected to a higher voltage than its rated voltage. As a result, the 11 W device is likely to burn out before the 22 W device.

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Answer:

The orbital velocity an aircraft orbiting around a heavenly body is found as follows;

At the orbital velocity, \(F_G\) = \(F_C\)

Where;

\(F_G\) = The gravitational force = \(\dfrac{G \cdot M \cdot m}{R_E^2}\)

\(F_C\) = The centripetal force = \(\dfrac{m \cdot v_0^2}{R_E}\)

Therefore

\(v_0 = \sqrt{\dfrac{G \cdot M}{R_E} }\)

Therefore, at the orbital velocity of the spacecraft, the centripetal force attracting the person away from the central region heavenly body is equal to the gravitational force pulling the person towards the center of the heavenly body (which was felt as her or his weight), and the person feels weightless while inside the orbiting spacecraft

Explanation:

The object's speed reaches a maximum value and stays there if you drop it and it falls far enough for this to occur.

The speed of an object, also known as v in kinematics, is a scalar quantity that refers to the size of the change in that object's position over time or the size of the change in that object's position per unit of time.  An object's average speed during a period of time is calculated by dividing its distance traveled by the length of the interval, the instantaneous speed is the maximum possible speed as the interval's duration gets closer to zero. Velocity and speed are different concepts.

Distance divided by time is the dimension of speed. Although the meter per second (m/s), the SI measure of speed, is the most often used unit of speed.

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Answer:

A

Explanation:

Low energy photons (such as radio photons) behave more like waves, while higher energy photons (such as X-rays) behave more like particles.

Answer:

B. It has a short amplitude.

:)

Answer:

Given that

speed u=4*10^6 m/s

electric field E=4*10^3 N/c

distance b/w the plates d=2 cm

basing on the concept of the electrostatices

now we find the acceleration b/w the plates  to find the horizontal distance traveled by the electron when it hits the plate.

acceleration a=qE/m=\(1.6*10^{-19}*4*10^3/9.1*10^{-31} =0.7*10^{15}\)=\(7*10^{14}\) m/s

now we find the horizontal distance traveled by electrons hit the plates

horizontal distance

\(X=u[2y/a]^{1/2}\)

=\(4*10^6[2*2*10^{-2}/7*10^{14}]^{1/2}\)

=\(3*10^{-2}\)= 3 cm

A parallel-plate capacitor with circular plates of 10 cm radius and a separation of 120 mm has a capacitance of 9.27 pF.

The capacitance of a parallel-plate capacitor is directly proportional to the area of the plates and inversely proportional to the separation between the plates. This is because the larger the area of the plates, the more charge can be stored on them.

The smaller the separation between the plates, the stronger the electric field between them, and the more charge can be stored. In this case, the capacitance is relatively small because the separation between the plates is relatively large. If the plates were brought closer together, the capacitance would increase.

This can be calculated using the following formula:

C = (epsilon_0 * A) / d

where:

* C is the capacitance in Farads

* epsilon_0 is the permittivity of free space (8.85 x 10^-12 F/m)

* A is the area of the plates in square meters

* d is the separation between the plates in meters

In this case, the area of the plates is pi * (10 cm)^2 = 78.54 square centimeters, and the separation between the plates is 0.12 m. Substituting these values into the formula, we get:

C = (8.85 x 10^-12 F/m * 78.54 square centimeters) / 0.12 m = 9.27 pF

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Examples of student-led organizations are:

The benefits of getting involved in any of these are many. They include but are not limited to:

Learn more about student organizations in the link below:

Answer:

10 N

Explanation:

Given that,

A man pushes against a tree with a force of 10 newtons.

We need to find the amount of force exerted by the tree on the man.

The force exerted by the tree on the man will be equal to the force that the man exert on the tree as per Newton's third law of motion.

It means the tree exert 10 N force on the man. Hence, the correct option is (c) i.e. 10 N.

The three product which can be potentially fail considering Load Strength graph and precautionary measure to prevent failure are as below;

Ball Pen:

1. Ink Leakage: One potential failure of a ball pen is ink leakage. This can occur due to poor sealing between the ink reservoir and the ballpoint mechanism. Ink leakage can result in messy hands, stained documents, and reduced functionality of the pen. To prevent this failure, manufacturers can improve the quality control process to ensure proper sealing and use high-quality materials for the pen's components.

2. Ballpoint Jamming: Another failure is ballpoint jamming, where the ball gets stuck and prevents smooth writing. This can be caused by a buildup of dried ink or debris inside the pen's mechanism. To prevent ballpoint jamming, regular cleaning and maintenance of the pen can be recommended. Additionally, manufacturers can design the pen with features that facilitate easy cleaning or provide instructions on how to clear any blockages.

3. Weak Barrel Construction: The barrel of the pen may also be prone to failure if it is weak or brittle. Excessive pressure or rough handling can lead to cracks or breakage, rendering the pen unusable. To prevent this, manufacturers can use durable materials for the pen barrel, such as sturdy plastics or reinforced metal, and perform quality checks to ensure structural integrity.

Room Key:

1. Keycard Malfunction: A potential failure of a room key is a malfunction in its electronic components. This can result in the keycard being unreadable by the door lock system, preventing access to the room. To prevent this failure, regular maintenance and replacement of keycard readers can be implemented. Additionally, guests should be advised to keep their keycards away from magnets and electronic devices that can interfere with the card's functionality.

2. Magnetic Strip Damage: Another failure can occur if the magnetic strip on the keycard gets damaged or demagnetized. This can happen due to exposure to magnetic fields or physical damage. To prevent this failure, keycards can be made more durable with protective coatings or alternative technologies such as RFID. Guests should also be educated on proper handling and storage of keycards to avoid damage.

3. Battery Drain: Some room keys use batteries to power their electronic components. A failure can occur if the battery drains, leading to an inactive keycard. To prevent this, low-power consumption designs can be implemented, and regular battery checks or replacements can be carried out by hotel staff. Guests should be informed about the importance of returning the keycard to the front desk for recycling or proper disposal to ensure the battery is replaced as needed.

Blender:

1. Motor Burnout: One potential failure of a blender is motor burnout due to prolonged use or overloading. Continuous operation at high speeds or attempting to blend hard or frozen ingredients beyond the blender's capacity can cause the motor to overheat and fail. To prevent motor burnout, manufacturers can provide clear guidelines on the maximum load capacity and recommended usage durations. Automatic thermal protection mechanisms can also be incorporated to shut off the blender if it detects excessive heat.

2. Blade Jamming: Another failure can occur if food particles or ingredients get jammed between the blender's blades, preventing them from spinning freely. This can happen if the blender is not properly cleaned or if ingredients are not adequately prepared before blending. To prevent blade jamming, users should be advised to clean the blender thoroughly after each use and ensure that ingredients are cut into manageable sizes. Manufacturers can also design blades with accessible mechanisms for easy cleaning or provide cleaning tools.

3. Leakage: A failure in a blender can also manifest as leakage. This can happen if the blender jar or its sealing components are damaged or improperly assembled. Liquid or food can leak out during blending, resulting in a messy and potentially unsafe situation. To prevent leakage, manufacturers should ensure proper sealing mechanisms and use high-quality materials for the blender jar and lid. Regular inspection of the sealing components can be advised,

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f0= square root of F/(m/L)/2L= square root of 200/0.010/2.00/2*2.00= 50 Hz. f=f0+deltaf. f=50+5= 55,45 Hz. f=f0= 50Hz.

both ends of the image and vibrates in the most basic manner while under tension. A mode of vibration consists of two unique components: first, a variation in the vibration over time; and, second, a variation in the motion across the structure's space. The oscillation frequency and any accompanying decay or growth rates are defined by the time variation.

The basic mode, also known as the first harmonic, is the simplest normal mode, where the string vibrates in a single loop and is designated by the number n = 1. The second harmonic refers to the second mode (n = 2) in which the string vibrates in two loops.

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It will take the car 16.67 sec to catch up with the truck.

Given the data in the question.

Since the car was stationary, then;

Initial velocity of the car; \(u_c = 0m/s\).

Final velocity of the car; \(v_c = 30m/s\).

Time taken for the car to reach given speed; \(t = 10s\).

At \(t = 0\), speed of truck; \(V_{truck} = 25m/s\)

First, we find the acceleration of the car, using the first equation of motion;

\(v = u + at\)

We make "a" the subject of the formula,

\(a = \frac{v-u}{t}\)

We substitute in our values and solve for "a"

\(a = \frac{30m/s - 0m/s}{10s}\)

\(a = 3m/s^2\)

Now, to determine how long will it take for the car to catch up with the truck.

Distance travelled by truck should be equal to distance travelled by car, so;

\(S_{truck\) = \(S_{car\)

We know that, speed; s = distance / time

So, distance of truck \(S_{truck\) = speed of truck × time \(= V_{truck} * t\)

Also, from the second equation of motion; distance "s" is;

\(s = ut + \frac{1}{2}at^2\)

So distance of the car \(S_{car} = ut + \frac{1}{2}at^2\)

We equate

\(S_{truck\) = \(S_{car\)

\(V_{truck} * t\) \(= ut + \frac{1}{2}at^2\)

we make "t" the subject of formula

we know that initial velocity of the car; u = 0

so, we divide both sides by "t"

\(V_{truck} = \frac{1}{2}at\)

\(t = \frac{2V_{truck}}{a}\)

We substitute in our values

\(t = \frac{2 * 25m/s}{3m/s^2}\)

\(t = 16.67s\)

Therefore, It will take the car 16.67 sec to catch up with the truck.

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Answer & Explanation:

To solve this problem, we need to set the gravitational force acting on the bead equal to the electric force acting on it. The bead will hang suspended in the air when these two forces are equal.

The gravitational force \(\( F_g \)\) is given by:

\($$ F_g = m \cdot g $$\)

where \(\( m \)\) is the mass of the bead and \(\( g \)\) is the acceleration due to gravity.

The electric force \(\( F_e \)\) is given by:

\($$ F_e = q \cdot E $$\)

where \(\( q \)\) is the charge of the bead and \(\( E \)\) is the electric field strength.

Setting these two equal gives:

\($$ m \cdot g = q \cdot E $$\)

Solving for \(\( E \)\) gives:

\($$ E = \frac{m \cdot g}{q} $$\)

Given that the mass \(\( m \)\) of the bead is 0.10 g (or 0.10/1000 kg), the acceleration due to gravity \(\( g \)\) is approximately 9.8 m/s², and the charge \(\( q \)\) is the charge of \(1.0 x 10^10\) electrons (with the charge of one electron being approximately \(\( 1.6 \times 10^{-19} \) C)\), we can substitute these values into the formula to find the electric field strength. Let's calculate that.

The electric field strength that will cause the bead to hang suspended in the air is approximately \(\(6.13 \times 10^5\)\) N/C (Newtons per Coulomb).

The purpose of working out is described as an example of motivation, as Randy works out every day because he wants to make the football team, so option A is correct.

In humans and other animals, motivation is what causes an activity to start, continue, or end at a specific time. The interpretation of motivational states as internal forces that increase an agent's propensity to engage in goal-directed behavior is common. Conflicting theories exist on the makeup of motivated moods. They are known as content theories, and they aim to explain the typical or consistent motives.

Behaviorist theories seek to elucidate behavior solely in terms of the relationship between the circumstance and outward, apparent conduct, avoiding any explicit mention of conscious mental states.

Therefore, the purpose of Randy's working out daily is described as an example of motivation, he is motivated to make a football team.

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If the atmosphere warmed up by 5 ∘C, the atmospheric pressure at 5 km above sea level would decrease by approximately 430 Pa.

This can be calculated using the following formula derived from equation (1.6):

ΔP = -ρgΔh

where:

ΔP = change in pressure

ρ = density of air

g = acceleration due to gravity

Δh = change in height

Atmospheric pressure at a given height is directly proportional to the density of air at that height. As temperature increases, the density of air decreases, leading to a decrease in atmospheric pressure.

Using the above formula, we can calculate the change in pressure at a height of 5 km due to a temperature increase of 5 ∘C:

ΔP = -ρg

Δh= -(ρ₀ - αρ₀ΔT)g

Δh= -(1.25 kg/m³ - (1/273 K)(-5 ∘C)(1.25 kg/m³)) × 9.81 m/s² × 5000 m

≈ -430 Pa

The atmospheric pressure at 5 km above sea level would decrease by approximately 430 Pa if the atmosphere warmed up by 5 ∘C.

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The difference in power for two people carrying the boxes up the ramp is 30 W.

Given the following data:

W = 40.0 N is the weight of a box.

The ramp's length is L = 2.00 m.

The platform height is h = 1.0 m.

t = 2.0 s is the time interval for the first person.

t' = 4.0 s is the time interval for the other person.

Power is the rate at which energy is used. The expression for the Power is given in the given question as,

P = W×(L+h)/t

Assume that you are solving for the first person.

P₁ = W(L+h)/t₁.................................................................. (1)

Substitute the following values into equation (1):

P₁ = 40(2+1)/2

P₁ = 20(3) (3)

P₁ = 60 W.

Regarding the second person,

P₂ = W(L+h)/t₂..................................................................... (2)

Fill in the blanks in equation (2) as follows:

P₂ = 40(2+1)/4

P₂ = 10*(3) *3)

P₂ = 30 W

Obtaining the difference in power as

P = P₁ - P₂

P = 60-30

P = 30 W

As a result, we can conclude that the difference in power for two people carrying the boxes up the ramp is 30 W.

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Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not.

However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.

Hope this helps :)

An evacuation is a process that removes air and moisture from the A/C system. The level of moisture in the system can affect its performance and cause damage to its components. Therefore, evacuating the system is a crucial step in ensuring optimal A/C performance.

During the evacuation process, a vacuum pump is used to remove the air and moisture from the system. The length of time for the evacuation process and the level of vacuum pressure used can impact the amount of moisture removed. However, on average, it is estimated that about three percent of moisture is removed during the evacuation process.

In summary, during a typical evacuation of a mobile A/C system, about three percent of moisture is removed. This process is crucial in ensuring optimal A/C performance and protecting the system from potential damage.

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Answer:

Hey mate

Your answer will be 5 N Upwards.

I will explain this to you.

In the attachment we can see that there are two forces acting on the object from the same side. And we know that when force acts from the same direction. Then the total force

=> sum of all the forces in that particular direction.

I hope you got it :)

TheSarcasmic