Which can be used as a lever ? A. a black tire
B. a long board
C. a large ball
D a piece of paper

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.