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What is the minimum work by the force P to move the 8-kg block to the top of the incline of uk=0.4? Compare this with the work needed to lift it vertically to the same height
A copper wire, with resistivity 1.72 x 10-8 Ω•m, is 750 meter long and 2.5 millimeter in diameter. Evaluate what is the resistance of the wire in Ω•m
q1. a hollow cylinder of radius and height has a total charge uniformly distributed over its surface. the axis of the
a closely wound rectangular coil of 90 turns has dimensions of 20.0cm by 44.0cm. the plane of coil is rotated from a
a metal cylinder which has length l and a resistance of 4 ohms is melted down to form a new cylinder with twice the
A space craft with a mass equal to .25*(mass of moon) is in orbit about the sun with a period of 3 years. calculate the average radius of the space craft's orbit. (the distance from the space craft to the sun).
An explorer is caught in a whiteout (in which the snowfall is so thick that the ground cannot be distinguished from the sky) while returning to base camp. How far (in km) must he now travel to reach base camp
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
a student throws a rock with speed 20.0 m/s at 30 degrees off the edge of a cliff. how far horizontally off the edge does it hit the water
A tennis ball is shot vertically upward from the surface of an atmosphere-free planet with an initial speed of 20.0 m/s. How long has the ball been in the air when it returns to its original position
A ball is dropped from rest from the top of a building of height h. What is the height of the two balls when they are passing
A string with length L = 0.80 m and linear density µ = 2.5 g/m is under tension F = 4.0 N. The string is fixed at each end and when driven at the frequency of the n = 3 harmonic, a standing wave with amplitude A = 0.50 cm is produced.
an 84-o resistor and a 74-o resistor are connected in series across a battery. the voltage across the 84-o resistor is
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