Acharging rc circuit controls the intermittent windshield wipers in a car. the emf is 12.0 v. the wipers are triggered when the voltage across the 110 µf capacitor reaches 10.0 v; then the capacitor is quickly discharged (through a much smaller resistor) and the cycle repeats. what resistance should be used in the charging circuit if the wipers are to operate once every 1.70 s?

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal. find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

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?