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The turntable of a record player has an angular speed of 9.7 rad/s at the instant it is switched off. 4.0 sec later, the turntable has an angular speed of 1.1 rad/s. Find through how many radians does the turntable rotate from the time it is turned off until it stops? (Assume constant angular acceleration.)
q1. how many 104 w lightbulbs can you use in a 102 v circuit without tripping a 17 a circuit breaker? the bulbs are
A diver of weight 780 N stands at the end of a diving board of length L = 5 m and negligible mass. The board is fixed to two pedestals separated by distance d = 1.5 m
A projectile is launched at an angle of 45° above the horizontal. What is the ratio of its horizontal range to its maximum height
A mole of air in a closed container is initially at 300k. Suppose that you now add 10 J of heat to the air, without doing any work on it, what is the total thermal energy of the air
Sound propagating through air at 30oC passes through avertical cold front into air that is 4.0oC. If the soundhas a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?
Roberto reaches out of a window and tosses a rock straight up with a speed of 19.3 m/s. The ball is 30.6 meter above the ground when he releases it. Calculate the speed of the rock upon impact with the ground
three blocks are attached to each other via ropes and pulleys as shown. assume the pulleys are frictionless and the
What is the minimum (non-zero) thickness for the air layerbetween two flat glass surfaces if the glass is to appear dark when700 nm light is incident normally? What if the glass is to appear bright
An object is located 13.5 cm in front of a convex mirror, the imagebeing 7.45 cm behind the mirror. A second object, twice as tall asthe first one, is placed in front of the mirror, but at a differentlocation. The image of this second object has t..
A block of mass of 4kg is dragged 2m along a horizontal surface by a force F=30N acting on a 53 degree to the horizontal. Find change in kinetic energy of the block
Find out the energy dissipated by friction. Find the coefficient of kinetic friction between the tires and the road.
A parallel-plate capacitor in air has a plate separation of 1.50 cm and area of 25.0 cm^2. find the charge on the plates before and after immersion
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