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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?
The nucleus of an atom has a radius of about 6.8×10-15 m. The electron is normally at a distance of about 1.3×10-11 m from the nucleus. find the volume of the atom
Give the equation that describes the angular position of particle B? How long after the time t_1 does the angular velocity of particle B equal that of particle A?
in the absence of a nearby metal object the two inductances la and lb in a heterodyne metal detector are the same and
On the Apollo 14 mission to the moon, astronaut Alan Sheppard hit a golf ball with a 6 iron. For how much more time was the ball in flight
Two concentric metal spheres are found to have a potential difference of 846.0 V when a charge of 3.186·10-8 C is applied to them. What is the radius of the inner sphere
a force is dependent on position and is given by 4.00 nmxi 2.0 nm2xyj . an object begins at the origin. it first moves
A 23g bullet traveling 260 m/s penetrates a 2.7 kg block of wood and emerges cleanly at 205m/s. how fast does it move after the bullet emerges
Find the self inductance of the solenoid - Is the current increasing, decreasing, or holding steady? Explain.
A bullet with mass 5.44 g is fired horizontally into a 2.103-kg block attached to a horizontal spring. Find the initial speed of the bullet-block system
Calculate the average potential energy for the v=1 state of a harmonic oscillator. Use the substitutions for α and ω from your class notes to simplify your answer.
A person of mass m is standing at the edge of a large rotatingdisk. The disk is rotating without friction and has angular velocity ω, radiusR, and moment of inertia I. find what will be the change in angular velocity
A 4 kg object is subjected to two forces, F with arrow1 = 14 N i hat - 5 N j hat and F with arrow2 = 12 i hat - 14 N j hat. What is the object's acceleration
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