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An important feature of the Carnot cycle is that: A) its efficiency can be 100% B) its efficiency depends on the absolute temperature of the hot reservoir used C) its efficiency is determined by the temperatures of the hot and cold reservoirs between which it works and by the properties of the working substance used, and on nothing else. D) it is an example of an irreversible process that can be analyzed exactly without approximations E) no engine can be more efficient than a Carnot engine operating between the same two temperatures.
A rectangular block of ice 12 m on each side and 1.2m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917kg/m3.
According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Imagine the speed quoted is that of the end of the rod.
On a cool morning, while the temperature is 12.0 deg Celsius, you measure the pressure in your car tires to be 20psi. After driving 40.0 mi on the freeway, the temperature of your tires is 56deg Celsius. What pressure will your tire gauge now show..
What is the resultant velocity of the lightning bug. find the force provided by the cable.
A uniform solid disk with a mass of 45.00 kg and a radius of 0.393 m is free to rotate about a frictionless axle. Forces of 90.0 and 125 N are applied to the disk.
A 6 kg box is held at rest by two ropes that form a 30 degree angle with the vertical. and external for F acts vertically downward on the box.
A chair of weight 70 lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of = 37.0 directed at the angle of 42 below the horizontal and the chair slides along the floor.
Find the pressure at pump discharge, rate of flow of a pump, energy required by the pump, and size of the pump motor.
What is the total work done on the block by the applied force as the block moves a distance 10-m up the incline.
The venturi flowmeter shown in the figure is used to measure the flow rate of water in a solar collector system. The flowmeter is inserted in a pipe with diameter 1.9 {rm cm}; at the venturi of flowmeter the diameter is reduced to 0.64 {rm cm}. Th..
A disk with a mass of 37.5kg and a radius of 38.3cm is mounted on a frictionless horizontal axle. A string is wound many times around the disk and then attached to a 56.4kg block. Find the acceleration of the block, assuming that the string does n..
A small metal bead, labeled A, has a charge of 29 . It is touched to metal bead B, initially neutral, so that the two beads share the 29 charge, but not necessarily equally. When the two beads are after that placed 5.0 apart, the force between the..
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