Physics Quiz
1. What is the speed of light in vacuum?
- A. 299,792,458 m/s
- B. 3.00 x 10^8 m/s
- C. 300,000,000 m/s
- D. 3.00 x 10^7 m/s
💡 Answer & Explanation
Correct Answer: A. 299,792,458 m/s
The speed of light in vacuum is approximately 299,792,458 meters per second.
2. Who proposed the theory of relativity?
- A. Isaac Newton
- B. Albert Einstein
- C. Galileo Galilei
- D. Stephen Hawking
💡 Answer & Explanation
Correct Answer: B. Albert Einstein
Albert Einstein proposed the theory of relativity in the early 20th century, revolutionizing our understanding of space, time, and gravity.
3. What is the equation for Einstein's theory of special relativity?
- A. E = mc^2
- B. F = ma
- C. PV = nRT
- D. E = hf
💡 Answer & Explanation
Correct Answer: A. E = mc^2
Einstein's theory of special relativity is summarized by the equation E = mc^2, where E represents energy, m represents mass, and c represents the speed of light in vacuum.
4. What is the fundamental force responsible for holding atomic nuclei together?
- A. Electromagnetic force
- B. Gravitational force
- C. Weak nuclear force
- D. Strong nuclear force
💡 Answer & Explanation
Correct Answer: D. Strong nuclear force
The strong nuclear force is responsible for holding atomic nuclei together by overcoming the electrostatic repulsion between positively charged protons.
5. What is the energy equivalent of one electronvolt (eV)?
- A. 1.6 x 10^-19 joules
- B. 1.6 x 10^-13 joules
- C. 1.6 x 10^6 joules
- D. 1.6 x 10^-9 joules
💡 Answer & Explanation
Correct Answer: A. 1.6 x 10^-19 joules
One electronvolt (eV) is equivalent to approximately 1.6 x 10^-19 joules.