The frequency of infrasound is MCQ with Answer and Explanation

The frequency of infrasound is

A. Below 20 Hz

B. Below 10 Hz

C. 20 Hz - 20 kHz

D. Above 20 kHz

Answer: Option A

Infrasound < 20 Hz, ultrasound > 20 kHz.

This question belongs to: Science Physics

No comments yet. Be the first to start the discussion!

Question #1 Report Error

A car moving at 36 km/h is brought to rest in 2 s. Deceleration is

A. 18 m/s²

B. 5 m/s²

C. 2.5 m/s²

D. 10 m/s²

Correct Answer: Option B

Explanation:
36 km/h = 10 m/s. a = (0-10)/2 = -5 m/s², magnitude 5 m/s².

This question belongs to: Science Physics

Question #2 Report Error

One astronomical unit (AU) is the

A. Distance travelled by light in one year

B. Distance between Earth and Sun

C. Radius of Earth

D. Distance between Earth and Moon

Correct Answer: Option B

Explanation:
1 AU ≈ 1.5 × 10⁸ km, average Earth-Sun distance.

This question belongs to: Science Physics

Question #3 Report Error

0°C on Fahrenheit scale is

A. 212°F

B. 0°F

C. 180°F

D. 32°F

Correct Answer: Option D

Explanation:
Freezing point 0°C = 32°F.

This question belongs to: Science Physics