Question

Fill in the blanks:-
1. Speed of light in air is____________.

2. A pinhole camera can not be used to see the motion of a___________.

3. Partially dark portion of the shadow is called______________.

4. The image in a pinhole camera gets _________ if the hole is made bigger.

5. A roller coaster operates on the principle of________________.

6. S.I. unit of energy is_________.

7.The electricity obtained from the energy possessed by flowing water is called__________________.

8. Potential energy of a body is due to its______________.

9. A wound up watch spring has ________energy in it.

10.__________ and _________affect the Kinetic Energy of a moving body.

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Answer 1

Answer:

1. vaccume

2. picture

3.black people

4. clear

5. physics

6. km per sec

7. hydro

8. atp

9. spinning

10. wind and hydro

Explanation:

hope this helps you!

Answer 2

Answer:

1. 3 × 108 m/s.
2. don't know
3. penumbra .
4. blurred
5. energy transformation.
6. joule
7. hydro energy
8. state of state of rest or position
9. potential energy
10. The mass of the body and The speed of the body :