ASVAB General Science: Physics and Chemistry Concepts 2 — Questions and Answers
Question 1: Which type of wave requires a medium to travel through?
- Electromagnetic wave
- Light wave
- Sound wave (Correct answer)
- Radio wave
Correct answer: Sound wave
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?
- It decreases
- It stays the same
- It increases (Correct answer)
- It becomes unpredictable
Correct answer: It increases
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?
- 5 mph/s
- 10 mph/s (Correct answer)
- 12 mph/s
- 360 mph/s
Correct answer: 10 mph/s
Average acceleration = change in velocity / time = 60 mph ÷ 6 s = 10 mph/s.
Question 4: Which subatomic particle has a negative charge?
- Proton
- Neutron
- Electron (Correct answer)
- Nucleus
Correct answer: Electron
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?
- 0
- 7 (Correct answer)
- 14
- 1
Correct answer: 7
A pH of 7 indicates neutrality, where the concentrations of H⁺ and OH⁻ ions are equal.
Question 6: Which law states that energy cannot be created or destroyed, only converted?
- Newton's Second Law
- Law of Conservation of Mass
- First Law of Thermodynamics (Correct answer)
- Boyle's Law
Correct answer: First Law of Thermodynamics
The First Law of Thermodynamics (conservation of energy) states that total energy in a closed system remains constant.
Question 7: What type of bond forms when two nonmetal atoms share electrons?
- Ionic bond
- Metallic bond
- Hydrogen bond
- Covalent bond (Correct answer)
Correct answer: Covalent bond
Covalent bonds form when two nonmetal atoms share one or more pairs of electrons.
ASVAB General Science: Physics and Chemistry Concepts 2
Which type of wave requires a medium to travel through?