ASVAB General Science: Physics and Chemistry Concepts 2

Question 1

Which type of wave requires a medium to travel through?

Accepted Answer

Sound wave

Answer

Sound waves are mechanical waves that require a medium (solid, liquid, or gas) to propagate.

Question 2

What happens to the boiling point of water when salt is dissolved in it?

Accepted Answer

It increases

Answer

Dissolving salt in water raises its boiling point through a colligative property called boiling point elevation.

Question 3

A car accelerates from 0 to 60 mph in 6 seconds. What is its average acceleration?

Accepted Answer

10 mph/s

Answer

Average acceleration = change in velocity / time = 60 mph ÷ 6 s = 10 mph/s.

Question 4

Which subatomic particle has a negative charge?

Accepted Answer

Electron

Answer

Electrons carry a negative charge of −1, orbiting the nucleus of an atom.

Question 5

What is the pH of a neutral solution at room temperature?

Accepted Answer

7

Answer

A pH of 7 indicates neutrality, where the concentrations of H⁺ and OH⁻ ions are equal.

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