Heat Engines: A heat engine absorbs 64 kcal of heat each cycle and exhausts 42 kcal.(a) What is the efficiency of this engine?(b) How much work does this engine do per cycle?
Fill in the blank(s) with the appropriate word(s).
(a) 34% (b) 22 kcal
You might also like to view...
A metal rod of length 2.0 m is moved at 6.0 m/s in a direction perpendicular to its length. A 5.0 m T magnetic field is perpendicular to both the rod and its velocity. If the resistance of the rod is 15 m
what is the current in the rod?
A. 0.0 A B. 1.0 A C. 2.0 A D. 4.0 A E. 8.0 A
The average rate of erosion on the Moon is far less than on Earth because
A) the crust of the Moon is much denser than the Earth's crust. B) the Moon is much younger than the Earth. C) the Moon lacks wind, water and an atmosphere. D) the Moon's magnetic field protects it from the solar wind better than ours does. E) the Moon's mare long ago dried up, so there is no more wave erosion there.
State which element is oxidized and which is reduced in the reaction Al + 3F2 ? 2AlF3
In the apparatus shown here, when the switch is open there is not attractive force between the wires. When the switch is closed, the currents are in the same direction and the wires are attracted to each other. If the currents in the two parallel wires were to point in opposite directions, what would be the force between the wires?
a. Attractive. b. Repulsive. c. Zero. d. One is pushed up and the other pushed down. e. Each one pushes the other up.