Question 4156:

• JAMB 2021

A source of sound produces waves in air of wavelength 1.65m. If the speed of sound in air is 330ms\(^{-1}\), the period of vibration in air is?

A. 200
B. 0.005
C. 0.5
D. 0.02

Question 4157:

• JAMB 2021

The slope of the straight line displacement-time graph indicates?

A. Distance traveled
B. Uniform velocity
C. Uniform acceleration
D. Uniform speed

Question 4158:

• JAMB 2021

A man will exert the greatest pressure when he?

A. Lies flat on his back
B. Lies on his belly
C. Stands on both feet
D. Stands on the toes of one foot

Question 4159:

• JAMB 2021

Which of the units of the following physical quantities are derived?
I. Area
II. Thrust
III. Pressure
IV. Mass

A. I, II, III and IV
B. I, II, and III only
C. I, II, and IV only
D. I and IV only

Question 4160:

• JAMB 2021

A ball of mass 0.5kg moving at 10ms\(^{-1}\) collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

A. 0.2ms\(^{-1}\)
B. 0.5ms\(^{-1}\)
C. 5.0ms\(^{-1}\)
D. 5.5ms\(^{-1}\)