The term 'DENSITY' tells us…

the MASS of a material per unit VOLUME

the TEMPERATURE above which the material cannot remain LIQUID

the TEMPERATURE above which the material cannot remain SOLID

the VOLUME of a material per unit MASS

which one?

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.