Which moving body has no acceleration? a. a satilite orbiting at a constant speed b. a person rnning once around a track at a constant speed c. a car making a turn at a constant speed d. a person running 100m straight across a field at a constant speed

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.

State one important difference between a physical change and a chemical change?