Which type of mirror is placed behind the bulb in car headlights?

plane mirror

convex mirror

concave mirror

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