Part a if the coetficient of friction is 0.090, what is the ski's speed at the base of the incline? constants express your answer to two signitficant figures and include the appropriate units. a ski starts trom rost and sides dosn a 28 incline 70 m long value units request answer submit part b i the snow is level at the foot of the incline and has the same coefficient of friction, how far wil the ski travel along the level7 use energy methods express your answer to two significant figures and include the appropriate units ?

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 it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?