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A body slides down a plane inclined at 40 degrees to the horizontal, with an acceleration of 2.3 meters/second^2. Determine the coefficient of kinetic friction.
A grandfather's clock is calibrated at a temperature of 20 C. The pendulum is a thin brass rod with a heavy mass attached to the end. On a hot day, when the temperature is 30 C, does the clock run fast or slow? How much time does it gain or lose i..
A researcher notices that the frequency of a note is emitted by a car horn appears to drop from 284 Hz to 266 Hz as the car passes him. What value does he obtain for the speed of the car
A playground merry-go-round has radius 2.50mand moment of inertia 2800kg?m2 about a vertical axle through its center, What is the average power supplied by the child
Two coils have the same number of circular turns and carry the same current. Each rotates in a magnetic field acting perpendicularly to its axis of rotation, What is the radius (in cm) of coil 2
A ball is dropped from the top of a 6.10m tall building, falls straight downward, collides inelastically with the ground and bounces back up. How many bounces can the ball make
A 4.0cm tall apple is 20cm in frount of a plano-convex lens of focal length 75cm. Find the location of the image of the apple
A body of mass 200 g is acted upon by a force of 20 n. Find the acceleration of the body. If the body above is having a volume of 1000 cm3 estimate its density in kg/m2.
A cannon has a barrel 5 m long and fires a 49 kg projectile with a muzzle velocity of 452 m/s. What is the average force on the projectile
A 10.00kg box on a smooth, frictionless, horizontal surface experiences a downward force of 30n at an angle of 40 degrees to the horizontal. The box moves 1.50 m to the right. What was the work done by gravity.
Point charge 3.0?C is located at x = 0, y = 0.30 m, point charge -3.0?C is located at x = 0 y = -0.30 m, what are the magnitude and direction of total electric force
A battery having an emf of 11.10 V delivers 111 mA when connected to a 73.0 load. Determine the internal resistance of the battery
q1. a power supply passing through a resistor is supposed to deliver 22-v dc at a max current of 150ma. the
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