8. What is not changed when work is done by a machine?

You drive from your house to the dry cleaners, which is 12 miles east of your house. You then drive to the grocery store from the dry cleaners. The grocery store is 15 miles west of your house. You then drive back home from the grocery store.

What happen to water to cause it to change from causing erosion to deposition

Which of the diagrams is the correct model for the element beryllium? A) B) C) D)

What are the components of Vector B in the diagram provided? x=9.5 m left; y=7.2 m down x=11.5 m right; y=9.6 m down x=15 m right; y=19.9 x=19.9 m right; y=15 m up

A small metal ball hangs from the ceiling by an insulating thread. The ball is attracted to a positively charged rod held nearthe ball. The charge of the ball must be (a) positive. (b) negative. (c) neutral. (d) positive or neutral.

How are AC and DC generators different? In AC generators, commutators produce alternating current. In AC generators, no commutators or slip rings are used. In DC generators, slip rings produce direct current.

A 30.0-kg object experiences a drag force due to air resistance with a magnitude proportional to the square of its speed. The object falls with an acceleration of 4.00 m/s2 downward when it is falling downward at 70.0 m/s.

If a tank contains water 4 m deep, what is the pressure at the bottom of the tank? (Neglect the atmospheric pressure.)

Eli rolled a ball down the cement sidewalk as hard as he could. The ball rolled for less than a minute before it came to a stop. What force acted to slow and finally stop the ball? A.

Which of the following statements best explains why a book resting on a table is in equilibrium? a. The acceleration due to gravity is 9.8 m/s 2 for both the book and the table. b. There is a net force acting downward on the book. c.