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In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 12.0 oC. The temperature at the inside surface of the wall is 19.1 oC. The wall is 0.11 m thick and has an area of 8.8 m2. Assume that one kilowatt hour of electrical energy costs $0.10. How many hours are required for one dollar's worth of energy to be conducted through the wall?
A 71.0kg football player is gliding across very smooth ice at 2.00m/s, What is the player's speed afterward if the ball is thrown at 18.0m/s relative to the ground
A juggler performs in a room whose ceiling is 3.0 m above thelevel of his hands. He throws a ball upward so that it just reachesthe ceiling. What is the time required for the ball to reach the ceiling
q1. imagine a free electron and a free proton held midway between the plates of a charged equivalent plate capacitor.
The projection lens in a certain slide projector is a single thin lens. A slide 23.6 mm high is to be projected so that its image fills a screen 1.87 m high. Determine the focal length of the projection lens
a 200 loop square coil 0.8m to a side lies in the xy plane. The current in each loop of the coil is 8A clockwise. find the torque on the coil due to the magnetic field
Consider two transformers. Transformer A has 300 turns on its primary and 500 turns on its secondary. What is the amplitude of the secondary voltage on transformer B
An air-filled parallel-plate capacitor has plates of area 2.20 cm2 separated by 2.00 mm. What is the charge on the capacitor
On October 9, 1992, a 27-pound meteorite struck a car in Peekskill, NY, leaving a dent 22 deep in the trunk. what was the magnitude of its deceleration
A negative charge of -2.0 multiplied by 10-4 C and a positive charge of 9.5 multiplied by 10-4 C are divided by 0.30 m. What is the force between the two charges.
A circuit consists of an ideal ac generator, a 25 µF capacitor, and an 90? resistor, all connected in series. Find the average power supplied by the generator
assume that friction is so small that it can be ignored. a force toward the right of constant magnitude is applied to
Unpolarized light passes through two polaroid sheets. What fraction of the initial light is transmitted
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