The hot gas lines need to be insulated? A never B always C if they are exposed to cold temperatures that could cause the refrigerant to condense in the line D for systems using hfc refrigerants

when the particles of the medium move back and forth along the direction of the wave motion, the wave is a

What are two factors that affect sound quality?

What is cos (33°) ? A. 0.33 B. 0.84 C. 0.53 D. 0.65

Which term describes the rate at which electrical energy is used

In a generator, mechanical energy is converted into which of the following? A. an electromagnet B. a moving rod C. a magnetic field D. electrical energy

A container, partially filled with water, is resting on a scale that measures its weight. Suppose you place a 200 g piece of wood inside the container filled with water. What happens to the scale reading?

Which is the best analogy of a wave? -A wave is like building a ramp. -A wave is like shaking a hand. -A wave is like water rippling in a pond. -A wave is like knocking down a building.

you can produce a sound by plucking a string or by blowing in a pipe. how are these two ways of producing sound are similar

What would provide specific information about the materials in the equipment used in a certain experiment

The wavelength of sound wave is 30 m. Frequency is 7 Hz. What is the wave speed