An advantage of parallel circuits is that a. it is the simplest type of circuit to make. b. electrons can only take one path, so the flow of energy is always known. c. if one part of the circuit is not working, the other parts can still work. d. when one part of the circuit breaks, the whole circuit must be replaced.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

=force × distance a. work b. velocity c. pressure d. momentum

Which statement is best supported by the information in the chart? wave y is moving the fastest. wave x is moving the fastest. all of the waves are moving at the same speed. all of the waves have the same value of wavelengths per second.