Picat General Science 5

Question 1

What is the SI unit of electrical resistance?

Accepted Answer

Ohm

Answer

The ohm (Ω) measures electrical resistance and is named after physicist Georg Simon Ohm.

Question 2

Which type of energy is stored in a compressed spring?

Accepted Answer

Elastic potential energy

Answer

A compressed or stretched spring stores elastic potential energy, which is released when the spring returns to its natural length.

Question 3

Newton's Third Law of Motion states that for every action there is:

Accepted Answer

An equal and opposite reaction

Answer

Newton's Third Law states that forces always come in equal and opposite pairs — if A pushes B, B pushes back on A with the same magnitude.

Question 4

What is the correct formula for calculating speed?

Accepted Answer

Speed = Distance ÷ Time

Answer

Speed is defined as the distance traveled divided by the time taken to travel that distance.

Question 5

Which type of wave does sound travel as through air?

Accepted Answer

Longitudinal wave

Answer

Sound travels as a longitudinal wave, where particle displacement is parallel to the direction of wave propagation.

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