Which example illustrates Newton's second law? A. The force of a wheelbarrow on the ground is equal to the force of
the ground on the wheelbarrow.
B. A person pushes a wheelbarrow, causing it to move forward.
C. More mass is added to a wheelbarrow, and a larger force is
required to move it.
D. A wheelbarrow remains stationary when no one pushes on it.

Can someone explain to me how to do this problem ?

In the first law of thermodynamics, triangle e=q-w, what does q stand for

1.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the mass defect of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 2.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 3.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy per nucleon of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev