A box is at rest on a table. What can you say about the forces acting on the box? The upward
and the downward
are balanced.

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)