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Some rearview mirrors produce images of vehicles behind you that are smaller than they would be if the mirror were flat. Are the mirrors convex or concave? Compute what is the mirrors radius of curvature if vehicles 20 meter away appear 0.33 of their normal size?
A boat moves through the water of a river at 9 m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.9 m/s, how long does it take the boat to make a round trip consisting of a 225 m displacement d..
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons, How many electrons are there in 1.79 liters of water
compute your apparent weight at the top of a Ferris wheel, given that the radius of the wheel is 7.1 , it completes one revolution every 30 , and your mass is 51 .
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, speed of the bowling ball is measured a..
How to find out the force of friction
A 1.7 -V. dry cell can be tested by connecting it to a low-resistance ammeter; it should be able to supply at least 30 A. What is the internal resistance (in ohms) of the cell in this case
On its highest power setting, a microwave oven increases the temperature of 0.390 kg of spaghetti by 45.0°C in 150 s. What is its peak magnetic field strength
question a 78.3 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate
A speedboat moves on a lake with initial velocity vector v1,x = 8.21 m/s and v1,y = -2.95 m/s, What are the components of the speedboat\'s final velocity, Find the speedboat's final speed
Boiling Water at High Pressure. When water is boiled under a pressure of 2.00 atm, the heat of vaporization is 2.20 multiply.gif 106 J/kg, Compute the increase in internal energy of the water
A small single r=1mm is placed coaxially at the center of a long solenoid n=500 tunrs per cm. the solenoid carries a current i=7sin(wt) a) what is the magnetic field through the small coil? b) What is the flux though the small coil? c) What is the ra..
Suppose the insulating qualities of the wall of a house come mainly from a 4.0-in. layer of brick and an R-19 layer of insulation, What is the total rate of heat loss through such a wall
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