Which of the following is a FALSE statement? A. Heat moves through solids by conduction. B. Molecules move faster in warmer substances. C. Warm water is denser than cold water. D. Heat moves through liquids and gases by convection.

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Which of the following are appropriate acceleration units?