The 1.50-kg head of an ax is moving at 3.0 m/2 when it strikes a stack of woods and penetrates 0.085 into them (before stopping). What is the average net force the stack of woods exerts on the blade of the ax?

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

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

What quantity do units represent in value