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1. Calculate the specific heat of an unknown metal allow from the following data. An insulating container made of tungsten has a mass of 8.0 kg and contains 10 kg of water, both materials are at 16.0C initially. A 2.4 kg piece of the unknown metal allow initially at a temperature of 425C is dropped into the water, and the entire system reaches thermal equilibrium at 35.0C.
2. An aluminum ring rotates at 5 m/s when an engine operates at temperature of 150C, at which point the aluminum ring has a 5cm inner diameter and a 5.5cm outer diameter. The engine is 25C when the engine is not running. When the engine starts, what is the rotational kinetic energy of the ring at the cold temperature?
3. An ice cube that has a mass of 150.0 g and that has a starting temperature of -10C melts completely into a very large bucket of water whose temperature is 4C and stays 4C. What is the entropy change for the molecules contained in the ice cube? And for the bucket of water? The whole system?
4. A Carnot engine moves a piston which applies 5N of force to a rotating disc by moving a piston 0.25cm for a total of 5W of power. If the high temperature reservoir is 100K, what must the temperature of the low temperature reservoir be?
write a problem containing at least three forces of different magnitudes and directions which results in a constant
A critically damped simple harmonic oscillator starts at the origin at rest, and is subject to an additional force Fext = Fto/t. Find the subsequent motion
A researcher is trying to shoot a tranquilizer dart at a 1.8-m-tall rhino that is 150m away. What is the magnification of the telescope
a train travels due south at 30 ms relative to the ground in a rain that is blown toward the south by the wind. the
A telescope has an objective with a refractive power of 1.35 diopters, What is the angular magnification of the telescope
An electron is released from rest1.5cm from an infinite charged plane. It accelerates toward the plane and collides with a speed of3.0107m/s. What is the surface charge density of the plane
A camper is trying to start a fire by focusing sunlight onto apiece of paper. The diameter of the sun is 1.39 x109 m, and its mean distance from the earth is 1.50x 1011 m. The camper is using a converging lenswhose focal length is 10.3 cm.
Two charges are located in the x-y plane. If q1 = -4.25 nC and is located at x = 0.00 m, y = 0.680 m and the second charge has magnitude of q2 = 3.00 nC and is located at x = 1.50 m, y = 0.550 m, calculate the x and y components
question what is the acceleration of a 5.0 kg object acted on by a resultant force of 35.0 n? what is the acceleration
A boy coasts down a hill on a sled, reaching a level surface at the bottom with the speed of 8.4 m/s. If the coefficient of friction between sled's runners and snow is 0.040.
A silver rod and a common glass rod both have the same length when at 20.0°C. The silver rod is heated to 52.3°C. To what temperature must the glass rod be heated so that they are again at the same length?
If you have a thin spherical shell with radius b and electric potential v0 located outside a concentric spherical shell of radius a that is grounded with potential v1=0, what is the electric potential V(r,theta) everywhere
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