How many significant figures are present in the number 50,670?

Bobby is riding his bike down the road at a speed of 10 miles per hour. Ahead of him, he sees another rider, moving in the same direction. Bobby is catching up with the rider ahead of him.

Which of the following statements is false? In solids, the particles do not move around or change position; they can only vibrate in place.

A student rapidly rubs the palms of both hands together, after eating lunch. Which sequence correctly describes the energy transformations that occur? a. chemical mechanical heat b. mechanical heat chemical c. heat mechanical chemical d.

How do you find a controlled variable

A solution in which more solute may be dissolved at a given temperature is a (n)

Why have plants in the alpine biome adapted to survive on limited nutrients?

At a molecular level, does plasma have more or less energy than other states of matter?

A bobsledder pushes her sled across horizontal snow to get it going, then jumps in. After she jumps in, the sled gradually slows to a halt.

How can you predict the action of the element

How is the mass of a liquid substance affected after it freezes A) It increases. B) It decreases. C) It stays the same.