5.the motion of the piston of an automobile engine is approximately shm. a) if the stroke of an engine (twice the amplitude) is 0.100m and the engine runs at 3500rev/min., compute the acceleration of the piston at the endpoints of its stroke. b) if the piston has a mass of 0.450kg, what net force must be exerted on it at this point? c) what are the speed and kinetic energy of the piston at the midpoint of its stroke? d) what average power is required to accelerate the piston from rest to the speed found in c)?

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?

To a of 4 x hz is 1. 0. mm nm nm

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.