AS Associate Of Science In Physics 2 — Questions and Answers
Question 1: Which form of energy is stored in a compressed spring?
- Kinetic energy
- Thermal energy
- Elastic potential energy (Correct answer)
- Chemical energy
Correct answer: Elastic potential energy
A compressed spring stores elastic potential energy due to its deformation from its natural equilibrium position.
Question 2: The law of conservation of energy states that in an isolated system:
- Energy can be created but not destroyed
- Energy can be destroyed but not created
- Total energy remains constant (Correct answer)
- Only mechanical energy is conserved
Correct answer: Total energy remains constant
The law of conservation of energy states that energy cannot be created or destroyed, only converted from one form to another.
Question 3: What is the frequency of a wave with a period of 0.02 seconds?
- 0.02 Hz
- 50 Hz (Correct answer)
- 20 Hz
- 5 Hz
Correct answer: 50 Hz
Frequency = 1 ÷ period = 1 ÷ 0.02 = 50 Hz.
Question 4: Which type of wave requires a medium to travel through?
- Radio waves
- X-rays
- Light waves
- Sound waves (Correct answer)
Correct answer: Sound waves
Sound waves are mechanical waves that require a medium (solid, liquid, or gas) to propagate.
Question 5: According to Boyle's Law, if the volume of an ideal gas is halved at constant temperature, its pressure:
- Halves
- Doubles (Correct answer)
- Stays the same
- Quadruples
Correct answer: Doubles
Boyle's Law states pressure and volume are inversely proportional at constant temperature (PV = constant), so halving volume doubles pressure.
Question 6: What is the SI unit of energy?
- Watt
- Newton
- Joule (Correct answer)
- Pascal
Correct answer: Joule
The Joule (J) is the SI unit of energy, equivalent to one Newton-meter (N·m) or one kg·m²/s².
Question 7: The Doppler effect describes what phenomenon?
- The bending of waves around obstacles
- The change in observed frequency due to relative motion between source and observer (Correct answer)
- The reflection of waves off surfaces
- The interference pattern of two overlapping waves
Correct answer: The change in observed frequency due to relative motion between source and observer
The Doppler effect is the observed change in frequency (or wavelength) of a wave when the source and observer are moving relative to each other.
AS Associate Of Science In Physics 2
Which form of energy is stored in a compressed spring?