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A block starts from rest at the top of a 35° inclined plane and encounters a spring, of constant 6.4 kN/m, rigidly attached to the plane. If the block's mass is 81 kg and it compresses the spring by 64 cm, find the distance the block travelled before it encountered the spring.
An asteroid is discovered in a nearly circular orbit around the Sun, What is the asteroid\'s orbital period, its \"year,\" in terms of Earth years
A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 91 cm from the center of the mirror, What is the magnification of the pencil's image
A pendulum is made with a 4.00 kg mass suspended at the end of a thin rod, What is the length of the thin rod
question1a 25mw jet engine produces a sound level of 120db threshold of pain at a distance of 100m from the engine
A spring with 58 hangs vertically next to a ruler. The end of the spring is next to the 11- mark on the ruler. If a 2.5- mass is now attached to the end of the spring, illustrate where will the end of the spring line up with the ruler marks?
A sheet of glass (n = 1.50) is coated with a 500 nm thick layer of cubic zirconia (n = 2.18). How many phase changes do the reflected rays undergo
At an air show, a jet plane has velocity components v_x = 645km/h and v_y = 415km/h at time 4.00s and v_x = 878{km/h and v_y = 450km/h at time 6.77s. For this time interval, find the direction of its average acceleration
A spaceship of mass 2.20×106kg is cruising at a speed of 4.20×106m/s when the antimatter reactor fails, blowing the ship into three pieces
A ray of light traveling in air enters benzene contained in a rectangular tank whose walls are made of ice. The bottom of the tank is a mirror. What angle does the ray make with the horizontal (normal) when it reaches the side of the tank
an electric motor lifts an elevator car at the constant speed of 2 m/s. The power consumed by the motor to perform this task is 40000 W. what is the mass of the elevator
Delivery trucks that operate by making use of energy stored in a rotating flywheel have been used in Europe. how many minutes can it operate between chargings
To make an order-of-magnitude estimate of the energy level spacings in the nucleus, Calculate the energy of the ground state
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