Which pair of features best characterizes a sound wave? A) crest and compression's.
B) crest and troughs.
C) compression's and rarefaction's.
D) rarefaction's and trough's.

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit