A change in color during a reaction is often a sign that a chemical change has occurred.

What energy does a ski racer have as she crosses the finish line?

In the 1800s, one of the statements in John Dalton's atomic theory was that atoms are indivisible. Later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons.

Which of the following properties are not likely to be the target of community redevelopment programs? a. abandoned properties b. new homes c. unused properties d. polluted properties

The six metals have the work functions, W. Part A Rank these metals on the basis of their cutoff frequency. Rank from largest to smallest. To rank items as equivalent, overlap them.

22. Kerry Klutz drops her physics book off her aunt's high rise balcony. It hits the ground below 1.5 s later. a. With what speed does it hit? b. How high is the balcony (ignore air drag).

Which of the following statements about the Coriolis effect is correct? a. The Coriolis effect is not affected by wind speed. b. The Coriolis effect is weakest at the poles. c. The Coriolis effect does not affect wind direction. d.

What force would be needed to make a 10kg bowling ball accelerate down the alleyway with an acceleration of 3m/s2

If traveling at equal velocities, which object would have the most momentum

Which of the following happens when a material undergoes a phase change? a. The temperature changes. b. Heat flows into or out of the material. c. The chemical composition changes. d. The molecules break apart into atoms.

Friction between solids can be most accurately defined as the force that opposes the sliding motion of two surfaces that are touching each other. A. True B. False