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Q1. The electrical potential of the ground was measured at the top off a hill. If the height of the hill is 20 meters above the level of the surrounding plain, what will be the measured voltage?
Q2. Which of the following best describes the electric field vectors above a flat plain at the Earth's surface?
a) Parallel to the ground and pointing norht
b) Parallel to the ground and pointing south
c) Perpendicular to the ground and pointing upward
d) Perpendicular to the ground and pointing downward
A 260 wooden raft floats on a lake. When an 80 man stands on the raft, it sinks 5.0 deeper into the water. When he steps off, the raft vibrates for a while. What is the frequency of vibration.
A high-voltage transmission line with the resistance of 0.30 /km carries a current of 950 A. The line is at a potential of 710 kV at the power station and carries the current to a city located 161 km from the station.
A small piece of dust ofmass m = 2.3 µg travels through an electric aircleaner in which the electric field is 567 N/C. The electric force on the dust particle is equal to the weight of the particle.
question1a war-wolf or trebuchet was a device used throughout the middle ages to throw rocks at castles and now
Two masses of 27 kg and 18 kg are suspended by a pulley that has a radius of 12 cm and a mass of 9 kg, Determine the speeds of the two masses as they pass each other
A 2.20-uF capacitor is connected across an ac source whose voltage amplitude is kept constant at 60.0V but whose frequency can be varied, Find the current amplitude when the angular frequency is 100 rad/s
You are lowering two boxes, one on top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp. find the magnitude of the friction force on the upper box
The magnitude of each of the charges in the figure below is 8.65 10-12 C. The lengths of the sides of the rectangles are 3.12 cm and 5.40 cm. Find the magnitude of the electric field at the center of the rectangle in the figures below
if a car wheels are locked and the resulting skid marks are 150m long, how fast was the car going when the wheel became locked
One particle has a mass of 3.00 10-3 kg and a charge of +8.40 µC. A second particle has a mass of 6.00 10-3 kg and the same charge. Find the initial separation between the particles
You have invented a new game and are playing it with your friends. You have a projectile launcher that fires a brick (mass=2 kg) with a speed and angle that you can adjust. What is the work done by friction during the block's motion
an aa battery is connected to a parallel-plate capacitor having 4.00cm diameter plates spaced 5mm apart. how much
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