Two objects are dropped from rest from the same height. object a falls through a distance da and during a time t, and object b falls through a distance db during a time 2t. if air resistance is negligible, what is the relationship between da and db? da=1/4dbit cannot be determined from the information given. da=4dbda=2dbda=1/2db

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

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.