Which of the following is a fundamental quantity?

• A. Luminous Intensity

• B. Area

• C. Volume

• D. Velocity

• E. Concentration

• F. Acceleration

An object at rest will temporarily stay in its state of rest, and if the object is in uniform motion, it will temporarily move in a straight line, unless an external force acts upon it.

The above statement refers to Sir Isaac Newton's first law of motion.

• A. True

• B. False

Which of the following statement is incorrect concerning gravity?

• A. The force of gravity is generally considered the strongest force among the four forces that govern the universe

• B. Your weight changes as you travel away from the earth

• C. If we dig the earth until we get into its center, we will have no weight as a result of lack of gravity

• D. Gravity prevents us from falling off the constantly rotating earth

• E. If a hammer and a feather are dropped simultaneously in a vacuum, they will both land at the exact same time as a result of gravity

• F. Weight is always a function of gravity

Sir Isaac Newton was hit by an apple when he pondered on force, motion and gravity.

• A. True

• B. False

The movement of gaseous particles through a tiny hole is termed _____.

• A. Osmosis

• B. Diffusion

• C. Effusion

• D. Infusion

• E. Defusion

• F. Gaslusion

The Standard International (SI) unit for density is kilogram per cubic metre (Kg/m³).

The table below shows various substances with their densities:

Please read on density here