Which of the following is a false statement?

A. Solid substances need different temperature of heat to melt them.

B. All solid substances require the same temperature and heat to melt them.

C. Heat is sometimes necessary to change physical property of an object.

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Which metal exist in liquid state and can be cut with knife ?

Correct relationship between molecular formula and empirical formula