A ball is falling toward the Earth with a speed of 10m/s and has a mass of 0.5kg. what's the kinetic energy?

What class is #29 MOD

A company which produces electricity, like Progress Energy, is considering buying extra coal to hold in inventory. They want to buffer against a potential strike at a major coal producer which would likely result in a significant price increase.

a 45kg box of books is lifted o a bookself 1.75 m above the floor. how much work was done to lift the books?

Which lists imaging techniques that use wave behaviors in order of increased risk of cancer from least risk to greatest?

Radioactivity was discovered in about

When a cyclist rides past you on the street, this is an example of

Why are galaxies visible

I hockey puck slides across an ice rink more easily than it does across a rough concrete surface why is this

Sodium-22 Sodium-25 # of protons # of neutrons # of electrons

As the particles of a solid undergo sublimation, they A: lose energy B: move closer to one another C: change temperature D: move farther apart from one another