a certain amount of work is required to push a heavy crate 2m across the floor. How much work is required to push the same crate 8m across the floor.

Explanation:

If the velocity during motion is constant, moving the crate four times as far will require four times the work

W = Fd

4W = F(4d)

0.3x0.21x0.08kg=mass 1 sheet

mass 500 = 500xmass 1

volume pile = 0.3x0.2x0.048

density=mass/volume= 500xmass 1/0.3x0.2x0.048

v patient student

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: