A person pushes horizontally with a force of 170. N on a 66.0 kg crate to move it across a level floor. The coefficient of kinetic friction is 0.150. (a) What is the magnitude of the frictional force? (b) What is the magnitude of the crate's acceleration? Use g=9.81 m/s2.

(a)

(b)

Explanation:

First, we write the equations of motion of the crate for each axis:

Since the kinetic frictional force is equal to , and from the second equation we have that:

This means the frictional force has a magnitude of 97.1N (a).

Next, we use this value to calculate the magnitude of acceleration from the first equation of motion:

In words, the magnitude of the crate's acceleration is 1.10m/s² (b).

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:

vapour or gas assuming atmospheriv pressure