1) A The 78g
2) C Push on the wagon in the opposite direction as Jack with a force that is the same as Jack is applying.
The gravitational potential energy
gpe = mgh
Frequency is 1 over the period. Hence, the frequency is 1/18.
The smallest parts that make up different types of matter are called atoms.
Atoms are tiny elements that are made up of literally everything on earth. <span />
renewable: water, plants, animals
nonrenewable: rocks, soil
i hope this helps :)
