Explain the difference between a physical equilibrium and a chemical equilibrium

Is the variation in the density and composition of a body, where high density materials fall to the center of the body and low density materials float to the top?

Three sleds are being pulled horizontally on frictionless horizontal ice using horizontal ropes (Fig. 5.48). The pull is horizontal and of magnitude 125 N. Find (a) the acceleration of the system and (b) the tension in ropes A and B.

Speed training increases one's maximum velocity.

What type of potential energy is caused by the interaction of two objects with mass?

1) A sound wave with a frequency of 300 hertz is traveling through a medium at a speed of 320 meters/second. What is its wavelength? 2) A sound wave has a wavelength of 0.450 meters.

A 15-foot ladder is leaning against a house with the base of the ladder 4 feet from the house. How high up the house does the ladder reach? Round to the nearest tenth of a foot.

The electron structures of atoms are not involved in the emission of:

A boulder with a mass of 2,500 kg rests on a ledge 200m above the ground. What is the boulder's GPE

When and if Galileo dropped two balls of the same size but different masses from the top of the Leaning Tower of Pisa, air resistance was not really negligible. Which ball actually struck the ground first?

Which activity is an example of a chemical change? a. sugar dissolving in water b. water evaporating into water wapor c. lighting a match d. freezing water