If an unbalanced force of 25 newtons acts on an object that accelerates at 2.5 meters per second squared, what must be the mass of the object?

A.) 1.0 kg

B.) 10 kg

C.) 13 kg

D.) 63 kg

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

the force on the thing and the distance the force moves the thing

grav potential energy

it has to be b, about 97 percent.