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A cigarette lighter in a car is a resistor that, when activated, is connected across the 12-V battery. Suppose a lighter dissipates 32 W of power. Find
(a) the resistance of the lighter and
(b) the current that the battery delivers to the lighter.
We drop a 26-g ice cube (0C) into 1000 g of water (20C). Find the total change of entropy of the ice and water when a common temperature has been reached
What is the frequency of up and down oscillations of the wheel? Regard wheel as a mass on one end of a spring and regard the body of the car as a fixed support for the other end of the spring.
Two trains, each having a speed of 38 km/h, are headed at each other on the identical straight track. A bird that can fly 70 km/h flies off the front of one train while they are 68 km apart and heads directly for the other train. On reaching other tr..
A bead with a mass of 0.02 g and a charge of 20nC is free to slide on a vertical rod. At base of the rod is a fixed 20nC charge.
A block "A" of mass 3 kg on the table is connected to another block "B" of mass 2 kg hanging beneath by a string of negligible mass which passes through the hole. Calculate the unknown angular speed
A battery's ideal voltage is 12.0 V; its internal resistance is 1.46 ohms. what is the actual voltage supplied by the battery
A rectangular plate has a length of (20.4 0.2) cm and a width of (8.7 0.1) cm. Calculate the area of the plate
A 130 block on a frictionless table is firmly attached to one end of a spring with = 40. The other end of the spring is anchored to the wall. A 21 ball is thrown horizontally toward the block with a speed of 6.6.
The image behind a convex mirror (radius of curvature = 76.0 cm) is located 32.0 cm from the mirror. Where is the object located (give the distance to the mirror)
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.795 s to reach the opposite tower, 20.0 m away. If a 1 meter length of ..
In a downtown office building you notice each of the four sections of a rotating door has a mass of 85 kg. What is the width of each section of the door if a force of 64 N applied to the outer edgE
A string passes over a frictionless pulley and connects a 250 g block to 2.00 kg block. The inclines are frictionless. Assuming you release both masses from rest, how much time would it take the 250g to travel 2200cm next to the ramp.
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