Select the correct answer. in which situation is no work being done? a. a person carrying a box from one place to another b. a person picking up a box from the ground c. a person pushing a box from one place to another d. a person pulling a box from one place to another

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

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

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx