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Two wires are the same diameter but wire A is three times the length of wire B. What is the ratio of the heat produced in A to that produced in B if the same potential is placed across the ends of the two wires? Show your calculations.
The spin cycles of a washing machine have two angular speeds, 437 rev/min and 641 rev/min. The internal diameter of the drum is 0.620 m. Find the laundry's maximum tangential speed
consider light that is refracted by a prism shaped like an equilateral triangle. the incident ray is parallel with the
in electronic equipment wires that carry equal but opposite currents are often twisted together to reduce their
The image behind a convex mirror (radius of curvature = 66.0 cm) is located 25.0 cm from the mirror. what is the magnification of the mirror
The handle of a 25 kilogram lawnmower makes a 37 degree angle with the horizontal. Find what magnitude of force is required to push the mower at constant velocity
How fast would the rain have had to come to raise the ocean level that high in 40 days and nights, how much would the mass of the earth have changed for this event, and would that significantly alter the strength of gravity on earth?
what is the magnitude of the free-fall acceleration of a ball mass m due to the earths gravity at an altitude of 2.73r
A wind is blowing straight from north to south at an unknown speed. When you hold up a piece of thread you can see that the wind stretches it out so that it points from your hand to the south. What is the speed of the wind relative to the ground
An air puck of mass m1 = 0.21 kg is tied to a string and allowed to revolve in a circle of radius R = 0.8 m on a frictionless horizontal table. What is the horizontal force acting on the puck
A compact disk (CD) in a computer rotates from rest up to an angular speed of 31.4 rad/sec in 0.892 sec. What is the angular acceleration of the disc
Find the magnitude of the net force on arigid square loop of wire of side length l =6.36 cm. The center of the loop is 10.10 cm from the wire and theloop carries a current of 10.0 A.
A 1650-kg car is travelling at 31.2 m/s. How fast must a 91.0-kg bicycle and rider be travelling to have the similar kinetic energy as the car.
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