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At a distance of 60.0 km from a radio station antenna the electric-field amplitude is 7.60×10?2 V/m.Assuming that the antenna radiates equally in all directions (which is probably not the case), what is the total power output of the station?
A 11m ×13m house is built on a 15cm -thick concrete slab. What is the heat-loss rate through the slab
A ramp is 25 meters long and is inclined at 30 degrees with the horizontal. A block of mass 25 is pulled up at a constant acceleration of 1 m/s2. The coefficient of kinetic friction is 0.15. If the box starts at rest from the bottom, what would be..
q1. the magnitude of f is 384 newtons and it points at 344o measured counter clockwise from the positive x-axis. what
A drag racer crosses the finish line doing 216 mi/h and promptly deploys her drag chute, What force must the drag chute exert on the 850 kg car to slow it to 45.2 mi/h in a distance of 161 m
You are a professional frontier re-enactor who specializes in making lead shot. To do this you put 2 kg of ice into 2 kg of water, both at 0 C, into an insulated bucket.
In a head-on collision, a car stops in 0.30{\rm s} from a speed of 30{\rm m}/{\rm s}. What force is applied to the driver by his seat belt during that fraction of a second
A heat engine with a thermal e?ciency of 37% does 175J of work per cycle. How much heat is extracted from the hot reservoir per cycle
Two freight cars, each with a mass of 2.9 x 10^5 kg, collide and stick together. One was initially moving at 2.80 m/s and the other was at rest. What is the final speed.
An opaque cylindrical tank with an open top has a diameter of 3 meters and is completely full of water. How deep is the tank
q1. a 2.62 kg mass attached to a light string rotates on the horizontal frictionless table. the radius of the circle is
water is flowing in a horizontal pipe of variable cross section. Where the cross-sectional area is 1.80x10^-2 m^2, What is the PRESSURE and VELOCITY
A single-turn circular loop of radius 8.00 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.7G directed at 70 below the horizontal north direction. Find out the current in the loop.
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