The U$.$S$.$ originally started the fission bomb project because

a$)$ it thought it would need it against Japan.

b$)$ it wanted to threaten Russia with it after the war.

c$)$ It was afraid that Germany was developing it

d$)$ President Roosevelt was interested in the project

$18.$ Which one of these scientists grew up in Poland?

a$)$ Roentgen

b$)$ Curie

c$)$ Meitner

d$)$ Einstein

$19.$ Fusion is often called a thermonuclear reaction because

a$)$ it is a process that converts thermal energy into nuclear energy

b$)$ it is a nuclear reaction that takes in more thermal energy than it creates

c$)$ High temperatures are required to force the isotopes to get close enough to fuse

d$)$ It produces nuclear energy

$20.$ Which of these scientists was not very good at math, and was a much more visual

thinker?

a$)$ Newton

b$)$ Faraday

c$)$ Maxwell

d$)$ Meitner

$21.$ What triggers the fission process?

a$)$ A proton

b$)$ A neutron

c$)$ A laser beam

d$)$ Nuclear fusion

e$)$ An alpha particle

$22.$ One phenomenon or experiment that supports the wave theory of matter is

a$)$ the photoelectric effect

b$)$ the Michelson$-$Morley experiment

c$)$ the double slit experiment with light

d$)$ the double slit experiment with electrons