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Delicious77 [7]
3 years ago
10

Corra is playing with a basketball with her friends after school. She takes a shot and throws it high into the air. As the ball

travels from her hand up to the air, its energy is being converted. It converts again as it begins to fall through the air and into the hoop. Which of the following describe the energy conversions once the ball leaves Corra's hand?
A. Kinetic energy is converted to potential energy as the ball goes higher. Potential energy is then converted back to kinetic energy as the ball falls toward the basket.

B. Potential energy is converted to kinetic energy as the ball goes higher. Kinetic energy is then converted back to potential energy as the ball falls toward the basket.

C. Force is converted to kinetic energy as the ball goes higher. Kinetic energy is then converted to potential energy as the ball falls toward the basket.

D. Potential energy is converted to kinetic energy as the ball goes. Kinetic energy is then converted to force as the ball falls toward the basket.
Physics
1 answer:
Margarita [4]3 years ago
8 0

Answer:

A. Kinetic energy is converted to potential energy as the ball goes higher. Potential energy is then converted back to kinetic energy as the ball falls toward the basket.

Explanation:

At the highest point of the ball's path all the kinetic energy has been converted to potential energy; as a result the velocity of the ball is 0 m/s and it comes to a stop.

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If a second particle, with the same electric charge but ten times as massive, enters the field with the same velocity v ⃗ , what
masya89 [10]

Answer:

Explanation:

When an moving electric charge passes through a uniform magnetic field

its motion becomes circular .

If m be the mass v be the velocity , q be the charge on the mass B be the magnetic field and R be the radius of circular path

force on the moving charge created by magnetic field

= B q v

Centripetal force required for circular motion

= m v² / R

For balancing

B q v = m v² / R

v = B q R / m

Time period of rotation

T = 2π R / v

= 2 π R m / B q R

= 2 π  m / B q

For first particle

T₁ =  2 π  m₁ / B q₁

For second  particle

T₂ =  2 π  m₂ / B q₂

q₁ = q₂ and 10 m₁ = m₂ ( given )

Putting the values in second equation

T₂ =  2 π  10 m₁ / B q₁

= 10 x 2 π m₁ / B q₁

= 10 T₁

Given T₁ = T

T₂ = 10 T

3 0
3 years ago
Which of the following is an example of the law of conversion of energy
ruslelena [56]
Is there a picture so I can help you
8 0
3 years ago
How does energy transform from one form to another?
Sliva [168]
Energy can only be converted from one form to another

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4 0
3 years ago
Read 2 more answers
Suppose that the average U.S. household uses 15600 kWh (kilowatt‑hours) of energy in a year. If the average rate of energy consu
sweet [91]

Answer:

a) 166.4 s

b) (2.155 × 10⁷) s

Explanation:

15600 KWh for a year,

1 year consists of 365 × 24 hours = 8760 hours.

So, the power consumed in a year for an average household = (Energy/time)

= (15600/8760) = 1.781 KW = 1781 W

a) If the average rate of energy consumed by the house was instead diverted to lift a 1.80 × 10 3 kg car 16.8 m into the air, how long would it take

The power required for this lifting = (mgh/t)

m = 1800 kg

g = 9.8 m/s²

h = 16.8 m

t = ?

P = 1781 W

1781 = (1800×9.8×16.8)/t

t = (296,352/1781)

t = 166.4 s

b) how long would it take to lift a loaded Boeing 747 airplane, with a mass of 4.05 × 10 5 kg , to a cruising altitude of 9.67 km

The power required for this lifting = (mgh/t)

m = 405000 kg

g = 9.8 m/s²

h = 9.67 km = 9670 m

t = ?

P = 1781 W

1781 = (405000×9.8×9670)/t

t = (38,380,230,000/1781)

t = 21,549,820 s = (2.155 × 10⁷) s

Hope this Helps!!!

8 0
3 years ago
Why do the heights of the tides change over the course of a month?
Y_Kistochka [10]

Answer:

The heights of the tides change over the course of a month due to -

<u>the position of Sun , Moon and Earth .</u>

Explanation:

Tides are formed due to the gravitational attraction of the sun and the moon on the surface of the Earth .

Since , the Moon is closer to Earth as compared to the Sun , Hence , Moon has greater attraction on Earth than Sun .

Moon plays an important role for producing the Tides .

In every 27.3 days , the Earth and the Moon revolves around the common point .

Therefore , in every 27.3 days , a new tidal cycle forms .

Two types of tides are possible , high tide and low tides .

In a day , two high tide and two low tide occurs ,

And because of the angle of Moon with respect to Earth , the two high tides do not have the same height . same for the case of two low tide .

The height of tides differ in the height on a daily basis .

5 0
3 years ago
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