Question 186:

• JAMB 1981

The quantity (timbre) of sound depends on

A. Amplitude
B. Frequency
C. Harmonics
D. Velocity
E. Wavelength

Question 187:

• JAMB 1981

The mass of a proton is approximately equal to that of

A. An \(\alpha\)-particle
B. A \(\beta\)-particle
C. \(\gamma\)-ray
D. An electron
E. A neutron

Question 188:

• JAMB 1981

An object placed on the principle axis of a convex lens of focal length 10m produces a real image of double magnification. The image distance from the lens is

A. 30cm
B. 25cm
C. 20cm
D. 15cm
E. 10cm

Question 189:

• JAMB 1981

A liquid-in-glass thermometer should quickly register temperature changes. This is achieved by choosing a liquid that

A. Is opaque
B. Has high density
C. Has regular expansion
D. Has a high thermal conductivity
E. Can wet glass

Question 190:

• JAMB 1981

The extension in a spring when 5g wt was hung from it was 0.56cm. If Hooke's law is obeyed, What is the extension caused by a load of 20g wt?

A. 1.12m
B. 2.14cm
C. 2.52cm
D. 2.80cm
E. 2.24cm