1. A 12 kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s2. Find the force exerted by the rope. Show all your work.

How the properties of sound waves change as they spread out in a spherical pattern

What is another term for a polar molecule?

A 1.00 kg block of ice, at - 25.0°C, is warmed by 35 kJ of energy. What is the final temperature of the ice?

Example of a colloid?

The specific heat capacities of similar substances differ because of differences in which property? A. Latent heat of vaporization B. Temperature at which each melts C. Density D. Forces between molecules

For a stationary observer, when the source of a sound is moving, its pitch appears to change.

Give an example of each simple machine

The product PV, where P and V represent pressure and volume respectively, is a unit for which? A entropy B force C impulse D work

IF it possible for an object to move for 10 seconds at a high speed and end up with an average velocity of zero? true or false

The boy moving down the hill posses what energy?