Let's say you have a 1.0kg mass at rest, struck by a 2.0kg mass moving at -2.0m/s. They collide and stick together, thus combining their mass to a singular 3.0kg. What is the velocity of the
combined mass and what type of collision is this?

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

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?