A heat engine does 300 J of work during one cycle. In this cycle 900 J of energy is wasted.

What is the efficiency of the engine?

A. 0.25

B. 0.33

C. 0.50

D. 0.75

Investigate the relationship between volume and pressure of a gas at a constant temperature.

2 m3 of an ideal gas are compressed from 100 kPa to 200 kPa. As a result of the process, the internal energy of the gas increases by 10 kJ, and 150 kJ of heat is transferred to the surroundings. How much work was done by the gas during the process?

How far will a bird have traveled in 13 seconds if it maintains a speed of 31 m/s

Gravity has traditionally been defined as a force of attraction between things that have

A concave lens of power - 2D is placed in contact with a convex lens of power + 1.5D what will be the resultant power

If an ant were scaled up to the size of an elephant, the ant would be

A 4.0 kg food pack was dropped from a height of 200 m by a helicopter during flood relief operations. At what velocity will the food pack be falling halfway to the ground?

The sun generates both mechanical and electromagnetic waves. Which statement about those waves is true? The mechanical waves reach Earth, while the electromagnetic waves do not.

A 3-kg mass is in free fall. What is the velocity of the mass after 7 seconds?

How does the role of blood protect the body