a certain engine has a second-law efficiency of 85%. During each cycle, it absorbs 480J of heat form a reservoir at 300C and dumps 300J of heat to a cold termperature reservoir. What is the temperature of the cold reservoir?

When a wave source moves toward a receiver, does the receiver encounter an increase in wave frequency, wave speed, or both?

Which statement best describes gravity? 1. It is the force that repels only very small objects. 2. It is the force that acts between objects with zero mass. 3. It is the force that sometimes acts only on very large objects. 4.

According to ancient greek thought, what is the difference between violent and natural motion

Which of the following best defines volume? the amount of matter in a substance the shape of a sample of matter the amount of space that a sample of matter takes up the way that a substances atoms are arranged Wood is considered a good insulator

K-2/5=11k literal equations

All of the following would be useful in trying to obtain procedural information to replicate an experiment previously published except for a lab journal used in the original experiment. a published scientific journal. a dictionary.

What happens if the polar jet stream shifts to bring air from the north farther south

What do we call seismic waves that are transmitted along the outside of earth?

A wave with a speed of 437 m/s has a frequency of 28 hertz. What is the length of the wave?

Which situation is contrary to Newton's first law of motion? An object at rest begins to move when an external force is applied. A moving object has a constant velocity under the influence of balanced forces.