Apool can be filled by a pipe in 3 hours. it takes 3 times as long for another pipe to empty the pool. how long will it take to fill the pool if both pipes are open?

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

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.

By what primary heat transfer mechanism does the sun warm the earth?