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After 6.00 kg of water at 77.5 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. When heat is added to or removed from a solid or liquid of mass m and specific heat capacity c, the change in entropy can be shown to be ?S = mc ln(Tf/Ti), where Ti and Tf are the initial and final Kelvin temperatures. Using this expression and the change in entropy for melting, find the change in entropy that occurs.
A pot containing 1.03 liters of water, initially at 19*C, How much heat must be supplied to bring it to a boil
The light then passes through an analyzer at an angle of 22.5º to the polarizer. What is the intensity of light leaving the analyzer
Stan accelerates from a standing start at 2 m/s^2 and one second later Kathy accelerates from a standing start at the same position at 4 m/s^2. how long does it take Kathy to catch Stan
A spaceship of proper length298m takes0.79µs to pass an Earth observer. find the speed of this spaceship as measured by the Earth observer
When its coil rotates at a frequency of 258 Hz, a certain generator has a peak emf of 72 V. What is the peak emf of the generator
A block of mass 2.50 kg is pushed 3.00 m along a frictionless horizontal table by a constant 10.0 N force directed 25.0° below the horizontal. Determine the work done by the normal force exerted by the table
At what speed (m/s) would a 1140-kg car have the same momentum as a 12,600-kg truck traveling at17.8km/hr,What is the car's change in momentum
as two trains move along a track their conductors suddenly notice that they are headed toward each other. the figure
Assume that the masses of the chains, pulleys, and ropes are negligible and the crate is rising with an acceleration of 2.6 m/s2. Identify the force.
A planet orbits a star, in a year of length 2.49 x 107 s, in a nearly circular orbit of radius 2.39 x 1011 m. With respect to the star, evaluate the angular speed of the planet
Consider a parallel-plate capacitor with .30m by .50m-rectangular plates separated from eachother by .010mm. this capacitor has a capacitance of 280nF, find the dielectric constant of this capacitor
A free electron and a free proton are placed in an identical electric field. which of the following statement are true?
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