In one section of a plumbing system the water’s speed is 4 m/s and the pressure is 4.8 x 104 Find the pressure at a second section that is 9 m lower than the first one, if the pipe’s diameter at the second section is twice the value of the first one.

The plum pudding model of the atom state that ?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

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.