In the auditory system, the unit for measuring the amplitude of sound is

(a) pitch

(b) saturation

(c) timbre

(d) decibel

State the right hand rule of the direction of magnetic field in a conductor carrying current

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 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest