One result of wave refraction is that

wave energy is concentrated on headlands projecting into the water
wave energy is largely dissipated before the waves reach shore
wave energy is concentrated in the recessed areas between headlands
headlands are enlarged by sediment deposited on their seaward side

If steel is more dense that lake water, why can a boat float

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.