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A uniform magnetic field is normal to the plane of a circular loop 10 cm in diameter made of copper wire (diameter 2.5 mm). At what rate must the magnetic field change with the time if an induced current of 10 A is to appear in the loop? The resistivity of copper is 1.7x10-8?m
a 20 kg rock is on the edge of a 80 m cliff. the rock falls from the cliff. what speed does the rock have as it strikes
A microscope has an objective lens of focal length 6.55 mm. The objective forms an image 16.2 cm from the lens. What is the distance between the lenses
A ball is thrown horizontally from the top of a 60.0-m building and lands 100.0 m from the base of the building. Ignore air resistance. What must have been the initial horizontal component of the velocity
A car of mass 2,000 kg is initially traveling at a speed of 30 m/s. estimate the change in the kinetic energy of the car
A speedboat moves on a lake with initial velocity vector v1,x = 9.27 m/s and v1,y = -2.17 m/s, find the components of the speedboat\'s final velocity
The distance to the Andromeda Galaxy is estimated at about 2 ´ 106 light years. A light year is distance travelled by light in one year; if the speed of light is 3 ´ 108 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 ´ 107 s..
When you look at a clock on a space ship zooming by you at a fair fraction of the speed of light, What does the driver of the space ship see
An arrow is shot off the top of a bridge of unknown height. The speed of the arrow at launch is known to be 30.0 m/s. How tall is the bridge
A light bulb is connected to a 240-V wall socket. The current in the bulb depends on the time t according to the relation I = (2.828 A) sin[(596.6 Hz)t].Determine the resistance of the bulb's filament
It's found that string is set into oscillation only at the frequency 880 Hz and 1320 Hz as the frequency of an oscillator is varied over the range 500-1500 Hz. What is the tension in the string.
Suppose 1.0 mol of a monatomic ideal gas initially at 10 L and 348 K is heated at constant volume to 696 K, What is the efficiency of the cycle
A watertight car is submerged under water. What force is required to open a door of area 1.25 m2 if the average depth of water at the door is 1.92 m
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