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A juggler throws a ball straight up into the air and it takes 4.20 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.
Hair dryer draws a current of 9.2a. How long does it take 1.9*10^3 C of charge pass through? How many electrons does this represent.
A toy train engines (2.5Kg) is moving 0.25m/s when it collides with a car (1.6Kg) moving 0.15 m/s in the same direction, Find the speed of the engine-car combination as they move off together
A uniform magnetic field in a region of space changes at a rate of 5.000e-3 T/s. What is the strength of the induced electric field on a circle
After a golf ball is hit it takes off with an initial speed of 26.2 m/s and at an angle of 39.5° with respect to the horizontal. The golf field is flat and horizontal.
A potential difference of 1.50 V will be applied to a 40.0 m length of 18-gauge copper wire (diameter 0.04 in.), find the rate at which thermal energy will appear in the wire
Suppose 1.00kg of water at 100 degrees Celsius is mixed with 1.00kg of water at 0 degrees Celsius. What is the total charge in entropy of the mixture
a 7.4 cm-diameter-baseball has a mass 145 g and is spinning at 2000 rpm. Treating the baseball as a uniform solid sphere, whats its angular momentum
Normal blood presure in a human artery is 13.6 kPA; the blood flows with a speed of 0.12 m/s. What is the blood pressure in the clogged part of the artery
300. V are applied to a motor with a windings resistance of 65.0 ohms. At the maximum motor speed the back emf is 155. V. Find the current in windings as the motor starts
The temperature of a silver bar rises by 10.0°C when it absorbs 1.23 kJ of energy by heat is 525 grams. determine the specific heat of silver
The intensity (in W/m2) of one sound is 5.46 times as great as the intensity of another sound. what is the intensity level of the louder sound
You are pushing a refrigerator across the floor of your kitchen. You exert a horizontal force of 297 N for 7.4 s, what is the total work (by all forces) done on the refrigerator
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