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A charging 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 128-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 1.50 s?
Explain how much work does the gravitational force do on the block as the block travels from point P to (a) point Q and (b) the top of the loop?
A conducting spherical shell of inner radius of a and outer radius b carries a net charge Q. find the surface charge density on the outer surface of the shell
A 12-V battery causes a current of 0.85A through a resistor. How many joules of energy does the battery lose in a minute
A 860 ? resistor is connected to a variable-voltage power supply. What current flows in the resistor when the voltage is 15 V?
Two people carry a heavy electric motor by placing it on a light board 1.55 m long. One person lifts at one end with a force of 420 N, Where along the board is its center of gravity located
A helicopter flies over the arctic ice pack at a constant altitude, towing an airborne 159-kg laser sensor which measures the thickness of the ice, find the tension in the cable towing the sensor
Find out the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other.
The brass bar and the aluminum bar in the drawing are each attached to an immovable wall. At what temperature will the gap be closed
Two thin lenses with a focal length of magnitude 16.5cm , the first diverging, How far from this first lens is the final image formed
A uniformly charged conducting sphere of 1.6 m diameter has a surface charge density of 8.4 µC/m2. Find the net charge on the sphere
A child on roller skates undergoes an acceleration of 0.8 m/s2 due to a horizontal net force of 20 N. What is the mass of the child
A 539 Hz sound wave travels through a substance. What is the speed of sound in the substance
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