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A 31.5 cm focal length converging lens is 20.0 cm behind a diverging lens. Parallel light strikes the diverging lens. After passing through the converging lens, the light is again parallel. What is the focal length of the diverging lens?
A glider with mass m = 0.250kg sits on a frictionless horizontal air track, connected to a spring with force constant k = 4.60 N/m. What must the initial displacement of the glider be if its maximum speed in the subsequent motion is to be 2.60
A large metal ring has a radius of 0.30 m and a mass (uniformly distributed) of 2.5 kg. The ring hangs from a nail as shown. What is the rotational inertia of this object
A trained dolphin leaps from the water with an initial speed of 12. What is the vertical distance between the dolphin and the ball when the dolphin reaches the horizontal position of the ball
a bicycle is turned upside down in the shop being repaired. a friend spins the wheel, radius R, and notices that water drops fly off the wheel tangentially to the wheel, calculate the average velocity V during one revolution
An "energy bar" contains 18g of carbohydrates. If the energy bar was his only fuel, how far could a 68kg person walk at 5km/hr
A mass moves from rest down an inclined plane with an angle of 60 degrees at the top. find the acceleration of the mass down the ramp
A pendulum, consisting of a ball of mass m on a light string of length 1.00 m, is swung back to a 45° angle and released from rest. What is the block's speed after the collision
A 72 kg man in a 5-kg chair tilts back so that all weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with the radius of 1.0 cm, and find out the pressure exerted on the floor by eac..
Find the average horizontal force exerted by the ground on the feet of a sprinter of mass 44.1 kg who accelerates from rest to a speed of 12.4 m/s in a time interval of 1.00 s
X rays with initial wavelength 6.60×10?2nmundergo Compton scattering. What is the largest wavelength found in the scattered x rays
The light goes through a second polarizer and exits with an intensity of 225 W/m squared? What is the orientation angle of the second polarizer
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 23.0 m/s at an angle 28.0 degrees; What is the vertical component of the ball's velocity
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