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A copper weight is placed on top of a 0.23 kg block of wood (density = 0.60 x10^3 kg/m3) floating in water. What is the mass of the copper if the top of the wood block is exactly at the water's surface?
Light of wavelength 650 nm falls on a 0.31 mm wide slit and forms a diffraction pattern on a screen 1.5 m away. Find the width of the central maximum
q. an ideal spring with a stiffness of 379nm is attached to a wall and its other end is attached to a block that has a
A hot air heating system rated at 84,000 Btu/hr has an efficiency of 65%. The furnace fan can move 225 ft3 of air per minute. If the air enters the furnace at 60.0°F, determine the temperature of the outlet air.
A shot-putter accelerates a 7.3kg shot from rest to 17m/s, If this motion takes 1.3s , what average power was developed
From the top of a 70m building, you throw a ball straight up at 6m/s. The ball misses the building on the way down. what is the maximum height of the ball
An ?-particle has a charge of +2e and a mass of 6.64 × 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.75 × 106 V, what are the radius of its circular path
A 1 041-kg satellite orbits the Earth at a constant altitude of 103-km. What is the change in the system's potential energy
In a laboratory experiment, a Physics Major is given a stopwatch. a meterstick, and a simple pendulum, what value will he obtain for the acceleration due to gravity
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth's field. What is the current in the current loop
An electron is confined to a box the size of a small atom, 0.12nm across. ?p, What wavelength photon would have the same energy
Mary needs to row her boat across a 200 m-wide river that is flowing to the east at a speed of 1.1 m/s. Mary can row with a speed of 2.4 m/s. What is her speed with respect to the shore
A 0.05 kg bullet traveling at 600 m/s hits a 7.4 kg block of wood and stays in the wood. What is the velocity (speed) of the wood block immediately after the bullet hits it
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