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A magnet at the end of the Dial-O-Gram balance arm. The arm has an aluminum plate in the magnetic gap. What is the purpose of this magnet system? (You may want to search online for eddy current or Lenz' Law demonstrations..
A freezer with a coefficient of performance of 3.53 is used to convert 1.61kg of water to ice in one hour. How much heat is discarded into the room that houses the freezer
An engine that operates at half itstheoretical (Carnot) efficiency operates between 525?C and280?C while producing work at the rate of 850 kW. How much heat is wasted per hour
One mole of an ideal gas initially has a temperature of 52.5°C. If the pressure is held constant and the volume is doubled, what will be the final temperature of the gas
You send a beam of light from a material with index of refraction 1.19 into an unkown material. What is the index of refraction of the unknown material
A bicycle wheel of radius 0.50 m is rolling without slipping on a horizontal surface with an angular speed of 3pie rad/s when the cyclist begins to uniformly apply the breaks. find the initial tangential velocity of the bicycle wheel
A particle of mass m moving along the x-axis collides elastically with another particle of identical mass at rest in the lab frame and scatters. Its final momentum makes an angle theta with the x-axis in the lab. If its initial kinetic energy is K_0,..
A friend of yours is loudly singing a single note at 411 Hz while racing toward you at 25.5 m/s on a day when the speed of sound is 341 m/s.
During a very quick stop, a car decelerates at 7.2 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires, How long does the car take to stop completely in seconds
Two automobiles, each of mass 1.500*10^3 kg, travel in the same direction along a straight road. find the translational kinetic energy of the center of mass
four equal positive point charges each of charge -14 c are at the corners of a square of side 12cm.what charge should
A hollow, conducting spherical shell, of radius 3.50 cm, has charge ?9.14×10?5 C. What is the strength of the electric field 2.50 m from the center of the sphere, What is the direction of the field
High-speed stroboscopic photographs show that the head of a 260 g golf club is traveling at 54 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 44 m/s. Find the speed ..
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