Physics Questions and Answers
| 189. |
Sound travels at maximum speed in |
| |
- A. steel
- B. air
- C. vacuum
- D. steel
|
| 190. |
The process responsible for the enormous energy in the sun is |
| |
- A. nuclear fission
- B. nuclear fusion
- C. the buring of gases
- D. none of these
|
| 191. |
The process of nuclear fission occurs mainly in |
| |
- A. the sun
- B. the hydrogen bomb
- C. chemical reactions
- D. nuclear reactors
|
| 192. |
The positron is called the antiparticle of the electron, because it |
| |
- A. has opposite charges
- B. has same mass
- C. collides with an electron
- D. annihilates with an electron
|
