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A volltage drop of 0.00039 V is measured across a 1.2 m long piece of copper wire when 10 mA of current passes through it.
a. What is the resistivity of copper?
b. What is the radius of the wire?
c. What is the power dissipated in the wire?
An empty parallel plate capacitor is connected between the terminals of a 2.8-V battery and charged up, what is the new voltage between the plates of the capacitor
A nichrome toaster wire, initially at room temperature, carries 2.72A immediately after it's turned on. After the wire heats, the current drops to 2.44A
Find out the difference in potential between the birds feet.
An object weighs 294N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 240N. When it is immersed in oil, it weighs 258N.
A 535 g ball swings in a vertical circle at the end of a 1.4 m-long string. When the ball is at the bottom of the circle, the tension in the string is 22 N. Illustrate what is the speed of the ball at that point?
A train is travelling up a 3.2 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast. How long does it take for the last car to come to rest.
A large power plant converts 1000 kg of water to steam every second to run its generators. Compute the amount of heat required each second just to vaporize the water, assuming this is done at 100 C. What is the power input in megawatts for this pu..
A 7.5 nC charge is located 1.8m from a 4.2 nC charge. Find out the magnitude of the electrostatic force that one charge exerts on the other. Is the force attractive or repulsive.
A student decides to move the box of books into her dormitory room by pulling on a rope attached to the box. She pulls with a force of 168 N at an angle of 30.0° above the horizontal. The box has a mass of 21.0 kg, and the coefficient of kinetic f..
If the loop's diameter changes from 24.0cm to 5.8cm in 0.67s , what is the direction of the induced current, If the coil resistance is 2.6? , what is the average induced current
If the coefficient of friction between the ladder and ground is 0.42, illustrate what is the mass of the heaviest person who can safely ascend to the top of the ladder?
A pilot flies an airplane at a constant speed of 520 km/hr in the vertical circle of radius 1400 m. compute the force exerted by the seat on the 105-kg pilot at point A and at point B.
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