Ablock measure 10 cm by 10 cm by 5 cm , what is it’s volume

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

How to tell if a molecule is polar or nonpolar with electronegativity

The process of a material going through a change of state from a gas to a liquid