Which of the following best describes constructive interference? O When two sound waves overlap to produce a higher pitch
When two sound waves overlap to produce a lower pitch
When two sound waves overlap to produce a higher volume
O When two sound waves overlap to produce a lower volume

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

What is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

In the first law of thermodynamics, triangle e=q-w, what does q stand for