Which of the following is true of both nuclear fusion and nuclear fission?
a.
they both require a high energy input.
b.
they both occur without byproducts.
c.
they both have a high energy output.
d.
they both involve large atoms breaking into smaller atoms.

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .