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A container of water begins with a heat capacity of 500J/K (constant) and a temperature of 70?C. It cools in a room at 10?C until it too reaches that temperature; the temperature of the room does not change.
(a) What is the change in the entropy of the room during the cooling?
(b) What is the change in the entropy of the water?
(c) What is the net change in the entropy of the Universe? Does it obey the Second Law?
A 1.02 kg mass is suspended from a wire changes the length of the wire by 1.20 mm. find the stress in the wire due to the suspended mass
a person of mass Mp is standing in an elevator of Me suspended from the top of a building by a spring with spring constant k. what is the equilibrium constant of the spring
Capacitors C1 = 6.03 uF and C2 = 2.45 uF are charged as a parallel combination across a 298 V battery, Calculate the resulting charge on capacitor C2
A parallel-plate capacitor has 3.95 cm2 plates that are separated by 4.29 mm with air between them. If a 11.2 V battery is connected to this capacitor, how much energy does it store? The value of the permittivity of a vacuum is 8.8542 × 10 ^?12 C^..
A portable electric heater uses 14 Amp of current. What is the smallest radius of copper wire that can be used in the extension cord
Luigi wishes to suspend a lantern of mass m between his store and a telephone pole. THe cable attached to his store makes an angle (theta) to the wall. The cable to the telephone pole is horizontal.
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 1.8×106 one at an angle 17 degrees west of north, What is the total work they do on the supertanker
What is magnitude of the runner total displacement
The electric field inside a 50.0?cm? long copper wire is 5.00mV/m .What is the potential difference between the ends of the wire
In a college parking lot, the number of ordinary cars is larger than the number of sport utility vehicles by 85.7%, Find the number of SUVs in the lot
Dan is gliding on his skateboard at 2.00m/s. He rapidly jumps backward off the skateboard, kicking the skateboard forward at 8.00m/s (as measured by an observer on the ground). Dan's mass is 60.0kg and the skateboard's mass is 7.00kg.
an experiment is set up in which a red laser with a wavelength of 656.2m is directed through a large, irregularly shaped piece of synthetic material. What is the index of refraction of the synthetic material
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