Polytechnic Physics

Question 1

What is the speed of light in a vacuum?

Accepted Answer

3 × 10⁸ m/s

Answer

3 × 10⁶ m/s

Answer

3 × 10¹⁰ m/s

Answer

3 × 10⁴ m/s

Question 2

Which law describes the gravitational force between two masses?

Accepted Answer

Newton's Law of Universal Gravitation

Answer

Coulomb's Law

Answer

Hooke's Law

Answer

Faraday's Law

Question 3

What is the unit of frequency?

Accepted Answer

Hertz (Hz)

Answer

Newton (N)

Answer

Joule (J)

Answer

Kelvin (K)

Question 4

What type of wave is sound?

Accepted Answer

Longitudinal wave

Answer

Transverse wave

Answer

Electromagnetic wave

Answer

Standing wave

Question 5

What happens to the wavelength of light as its frequency increases?

Accepted Answer

Wavelength decreases

Answer

Wavelength increases

Answer

Wavelength stays the same

Answer

Wavelength doubles

Question 6

What is the principle of conservation of momentum?

Accepted Answer

Total momentum of a closed system remains constant unless acted on by an external force

Answer

Momentum is always zero in an isolated system

Answer

Momentum increases with velocity

Answer

Momentum and energy are always equal