ASVAB General Science: Physics and Chemistry Concepts 4

Question 1

What is the formula for calculating work done on an object?

Accepted Answer

W = F × d

Answer

Work equals force multiplied by distance (W = F × d), measured in joules.

Question 2

Which gas makes up the largest percentage of Earth's atmosphere?

Accepted Answer

Nitrogen

Answer

Nitrogen (N₂) makes up approximately 78% of Earth's atmosphere, while oxygen accounts for about 21%.

Question 3

What is an isotope?

Accepted Answer

An atom with a different number of neutrons than a standard atom

Answer

Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons.

Question 4

Which of the following best describes a conductor?

Accepted Answer

A material that allows electricity to flow easily

Answer

Conductors, such as copper and silver, have free electrons that allow electric current to flow easily through them.

Question 5

What happens to gas pressure when the volume of a container decreases at constant temperature (Boyle's Law)?

Accepted Answer

Pressure increases

Answer

Boyle's Law states that pressure and volume are inversely proportional at constant temperature, so reducing volume increases pressure.

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