Suppose the difference in rest energy of the neutron and proton were qn = (mn−mp)c 2 = 0.129 mev instead of qn = 1.29 mev with all other parameters unchanged (including the freezeout temperature for neutrinos at the time of big bang nucleosynthesis). estimate the – 2 – maximum possible mass fraction in he. you may assume all helium nuclei have two neutrons and two protons.'

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.