In which activity is no work done?

A. lifting a book

B. holding a brick

C. climbing stairs

D. pushing a shopping cart

Chris and Desiree are resting on an offshore raft after a swim. They estimate that 3.0 m separates the trough from the adjacent crest of each surface wave on the lake. They count 12 crests that pass by the raft in 20.0 s.

Why are eggs and milk products considered to be meet alternatives

How much energy (in kW-h) does a 900 Watt stove use in a week if it is used for 1.5 hours each day?

What do cell phones require to work? A. The GPS system B. Ultraviolet rays C. A cellular system D. X-rays

Tell whether the following statements are true or false: 1.) Humans see different colors because our eyes are responding to light that has different wavelengths. 2.

Can hand sanitizer be used as rubbing alcohol

Two objects experience a 12 N electrical force between them. What force will the objects experience if the distance between them is doubled?

a submarine moving directly upward in the water at constant speed. The weight of the summer and it is 500,000 N. The submarines motors are off. The magnitude of the buoyant force acting on the submarine is

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

Which of the following is not the name of a space station that was in orbit around Earth?