The of friction is a number that represents the resistance to sliding between two surfaces in contact with each other
a. force
b. value
c. number
d. coefficient

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 does the law of conservation of mass state?

Does heating a metal wire increase or decrease its electrical resistance? why?