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A boy whirls a stone in a horizontal circle of radius 1.9 m and at height 1.8 m above level ground. The string breaks, and the stone flies off horizontally and strikes the ground after traveling a horizontal distance of 8.6 m. What is the magnitude of the centripetal acceleration of the stone while in circular motion?
A sprinter crosses the finish line of a race. The roar of the crowd in front approaches her at a speed of 351 m/s. What is the sprinter's speed
A lead block is suspended from the underside of a 0.5 kg block of wood of density of 728 kg/m3. what is the mass of the lead block
A physics lecture room has a volume of 254 m3. For a gas pressure of 1.00 atm and a temperature of 27.0 oC, use the ideal gas law to estimate the number of air molecules in the room
An ocean liner leaves New York City and travels 21° north of east for 134km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the directions.
A Hall probe uses the Hall effect to measure the size of magnetic fields - it does this by measuring the potential difference across the electric field created by the displacement of charge
Visible light passes through a diffraction grating that has 900 slits per centimeter, and the interference pattern is observed on a screen that is 2.42 from the grating. What is the difference between these wavelengths
Given a metal which has a coefficient of volume expansion given by B(T) = 8.0x10^-6 K^-1 + (1.2x10^-8 K^-2)T caluclate the work done by this is obaric process
A step-down transformer is used for recharging the batteries of portable devices such as tape players. find the voltage supplied to a tape player from the transformer
The pilot of an airplane executes a loop-the-loop maneuver in a vertical circle. What is the pilot's apparent weight at the lowest point if his true weight is 160 lb
A muon (an elementary particle) enters a region with a speed of 4.90 106 m/s and then is slowed at the rate of1.20 1014 m/s2
An orchid grower hears that the temperature is expected to fall below freezing overnight, so she puts a large barrel in her orchid greenhouse, How much heat left the water during the night
question1a 60.0-kg projectile is fired at the angle of 30.0deg above the horizontal with an initial speed of 1.28 102
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