Fiona and her twin sister april are enjoying the bumper cars at an amusement park. fiona drives her car toward her sisters and the two cars collide. before the collision, fiona was moving with a speed of 3 m/s and april was moving with a speed of 1 m/s. after the collision, fiona is moving with a speed of 1 m/s and april is moving with a speed of 3 m/s. if fiona and her bumper car have a combined mass of 80 kg, what is the combined mass of april and her bumper car?
m2 = ? kg

What are the theoretical properties of a gas at a temperature of 0 kelvin?

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Does anyone have the answers to online physics course plato course physics, semester a v3.0