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The ends of a cylindrical steel rod are maintained at two different temperatures. The rod conducts heat from one end to the other at a rate of 10 J/s. At what rate would a steel rod twice as long and twice the diameter conduct heat between the same two temperatures?
You are using a magnifying glass held against your eye to study an insect. The distance between the insect and your eye/magnifying glass is 2.5cm. What is the angular magnification of the magnifying glass?
The single cable supporting an unoccupied construction elevator breaks when the elevator is at rest at the top of a 175 m high building.
A satellite is placed into an earth orbit and passes 100miles above the ground as its closest point while moving at 18,000mph. What is the furthest it gets from the surface, and how fast is it traveling at that point?
q1. a hollow aluminium cylinder is to be fitted over a steel piston. at 22degc the inside diameter of the cylinder is
Planet A and planet B are in circular orbits around a distant star. Planet A is 7.6 times farther from the star than is planet B... What is the ration of their speeds
A heat engine operates between a reservoir at 28°C and one at 354°C. What is the maximum efficiency possible for this engine
A rectangular loop lies next to a long straight wire, on the same plane. Both wires carry a current of 3A. find the magnitude and the direction of the net force on each loop
Given that the latent heat of water/steam is approximately 41,000 J/mol, at what pressure will water boil at 50 degress Celcius? hint: remember that at 1 atm water boils at 373 K. Also, assume that the latent heat is constant and that the volume of t..
When a 2.00-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.89 cm. If the 2.00-kg object is removed, how far will the spring stretch if a 1.00-kg block is hung on it
White light illuminates an oil film on water. Viewing it directly from above, What is the refractive index of the oil
An electron moves at right angles to a magnetic field of 0.109 T. What is its speed if the force exerted on it is 9×10-15 N.
A camera's flash uses the energy stored in a 260?F capacitor charged to 190V . The current in the charging circuit is not to exceed 21mA, What's the resistance in the charging circuit
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