A proton is fired from far away toward the nucleus of a mercuryatom. Mercury is element number 80, and the diameter of the nucleusis 14.0 fm. If the proton is fired at a speed of 4.0 \times 10^{7}\;{\rm m}/{\rm s},what is its closest approach to the surface of the nucleus?

a) Assume the nucleus remains at rest.
The unit is (fm)

The extremely high temperatures needed to trigger nuclear fusion are proposed to be generated by laser irradiating a spherical pellet of deuterium and tritium fuel of diameter 1.8 mm. (a) determine the maximum fuel temperature that can be achieved by irradiating the pellet with 200 lasers, each producing a power of 550 w. the pellet has an absorptivity 0.3 and emissivity 0.8.

Does heating a metal wire increase or decrease its electrical resistance? why?

What was the purpose of the apollo program? to put a man in orbit to launch a spy satellite to launch a space station to put man on the moon