A bike accelerates uniformly from rest to a velocity of 6.9 m/s over a distance of 72.8 m. Determine the acceleration of the bike.

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Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

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?