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A rock is thrown downward into a well that is 8.90 deep. If the splash is heard 1.20 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.
A shuffleboard disk is accelerated to the speed of 6.1 m/s and released. If the coefficient of kinetic friction between disk and the concrete court is 0.30, how far does the disk go before it comes to a stop? The courts are 14.5m long.
A small immersion heater can be used in a car to heat a cup of water for coffee or tea. suppose the manufacturer's claim of 60% efficiency.
What is the highest speed with which a 1550 car can round a turn of radius 76 on a flat road if the coefficient of static friction between tires and road is 0.50.
A shop sign weighing 245-N is supported by a uniform 155-N bean. Find out the tension in the guy wire, and the horizontal and vertical forces exerted by the hinge on the bean.
An oscillator with a mass of 430 g and a period of 0.900 s has an amplitude that decreases by 1.00% during each complete oscillation. If the initial amplitude is 9.20 cm, what would be the amplitude after 44.0 oscillations? At what time will the e..
What is the advantage of the new crumple zone design in new car's today when they are in a car crash, explain answer from a physics standpoint?
Ann was reaching up to grab a box of cereal that was on top of the refrigerator. She had extended her arm as well as stood on her tip-toes to reach the box. Which primary muscle allowed Ann to extend her elbow and which 2 primary muscles allowed h..
A cube has sides of length = 0.320 . It is placed with one corner at the origin. The electric field is not uniform but is given by -4.95 2.17 .Find out the electric flux through each of the six cube faces.
A 72 kg man stands on a spring scale in an elevator. Starting from rest, elevator ascends, attaining its maximum speed of 1.20 m/s in 0.80 s.
At time a grinding wheel has an angular velocity of 22. It has a constant angular acceleration of 28.0 until a circuit breaker trips at time = 1.60 . From then on, the wheel turns by an angle of 438 as it coasts to a stop at constant angular decel..
An ideal gas is expanded isothermally from 20L to 30L. During thismethod , 6J of energy is expended by the external mechanism that expanded the gas. Which of the statements is correct.
A circuit contains six 210 lamps and a 14 heater connected in parallel. The voltage across the circuit is 120V. If the circuit has a 12A fuse, will the fuse melt if all the lamps and the heater are on.
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