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A litre of water is utilized to cool some electronics. If 1,000 Joules of heat is given off by the electronics, by what temperature does the water increase? One litre of water has a mass of 1 kg and a specific heat of 4.184 Joules/(g C°).
You push a 1.5 kg block against ahorizontal spring, compressing the spring by 18 cm. What is the block-table coefficient of kinetic friction
A transformer has 400 primary turns and 1510 secondary turns. The input voltage is 120 V and the output current is 16.0 A. Assume 100 percent efficiency. What is the output voltage
A professor's office door is 0.95 wide, 2.2 high, 4 thick; has a mass of 22 , and pivots on frictionless hinges. A "door closer" is attached to door and the top of door frame. When the door is open and at rest, the door closer exerts a torque of 5..
What is the photoelectric effect? How can the photo electric effect be described in classical terms (if it can)? How can it be explained in quantum mechanical terms? What is blackbody radiation? How does classical theory describe blackbody radiation?..
A skier travels down an inclined trail at 22o and the coefficient of kinetic friction for the skier's shoes-ice surface is .2. Compute the skiers acceleration down the hill
Gas lanterns used on camping trips have mantles (small lacy bags that give off light) made from a rayon mesh impregnated with thorium and other materials. A typical mantle contains 439 mg of thorium. What is the reactivity of the mantle
A 0.400 kg block of wood hangs from the ceiling by a string, and a7.4x10^-2 kg wad of putty is thrown straight upward, striking thebottom of the block with a speed of 5.75 m/s. The wad of putty sticks to the block.
a 0.20-kg particle moves along the x axis under the influence of a conservative force. the potential energy is given
A satellite moves in a circular orbit around Earth at a speed of 5047 m/s. Determine the satellite's altitude above the surface of Earth
A car rounds a curve that is banked inward. The radius of curvature of the road is R = 139, the banking angle is ? = 31°, Find the minimum speed that the car can have without slipping
The distance to a star is approximately 7.60 x 1018 meter. If this star were to burn out today, in how many years would we see it disappear? Find how long does it take for sunlight to reach Mars
A uniform ring with a radius of 2.15 cm and a total charge of 6.37 ?C rotates with a constant angular speed of 3.84 rad/s, What is the magnetic moment of the rotating ring
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