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Pavel [41]
3 years ago
14

The photoelectric effect proved:

Physics
1 answer:
Jobisdone [24]3 years ago
6 0

Answer:

i think c)light has a charge

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Suppose a moving car has 2000 J of kinetic energy. If the carʹs speed doubles, how much kinetic energy would it then have?
Bond [772]

Answer:

option A

Explanation:

given,

Kinetic energy of the car = 2000 J

speed of the car is doubled

we know,

KE_1 = \dfrac{1}{2}mv^2

2000= \dfrac{1}{2}mv^2........(1)

now, speed of the car is doubled

v' = 2 v

KE_2 = \dfrac{1}{2}mv'^2

KE_2 = \dfrac{1}{2}m(2v)^2

from equation (1)

KE_2 = 4\times \dfrac{1}{2}m(v)^2

KE_2 = 4\times 2000

KE_2 = 8000\ J

Hence, the Kinetic energy would be equal to 8000 J.

The correct answer is option A.

8 0
3 years ago
A large blue marble of mass 3.5 g is moving to the right with a velocity of 15 cm/s. The large marble hits a small red marble of
neonofarm [45]
I hope this would help you

3 0
3 years ago
if your vehicle begins to slide or skid in the rear, you should? group of answer choices press the gas pedal and speed up. steer
MariettaO [177]

if your vehicle begins to slide or skid in the rear, you should steer in the direction that the rear is sliding to.

<h3>What should you do if the rear end of the vehicle starts to slide or skid?</h3>

In the case above, a person need to Look as well as steer in the direction that the person want the front of the vehicle to go.

Note that  in the case above;

Do stay way from  the brake pedal and never apply the brakes.

  • Steer in the the same direction as the rear of the vehicle that is known to be  sliding. This will give room for the vehicle to go straight instead of going sideways.
  • Then make sure to get ready to steer in the opposite direction if the vehicle is one that begins swerving in the other direction.

Therefore, if your vehicle begins to slide or skid in the rear, you should steer in the direction that the rear is sliding to.

Learn more about slide or skid from

brainly.com/question/2148046

#SPJ1

7 0
1 year ago
At which of the following angles will the sunlight received at a location on Earth spread out over the largest area?
yarga [219]
10 degrees, because 0 degrees will receive the most sunlight, and 10 degrees is closest to 0 degrees.
5 0
3 years ago
Read 2 more answers
Using newtons 2nd law, explain The relationship between acceleration, mass, and force.
shtirl [24]
According to Newton's second law of motion, Force is mass times the acceleration of the object.

It would be: F = m*a

Hope this helps!
8 0
3 years ago
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