Jamb Physics 1999 Past Questions and Answers

Question 16:

• JAMB 1999

Calculate the mass of ice that would melt when 2kg of copper is quickly transferred from boiling water to a block of ice without heat loss;
Specific heat capacity of copper = 400JKg^-1K^-1
Latent heat of fusion of ice = 3.3 x 10⁵JKg^-1

A. 8/33kg
B. 33/80kg
C. 80/33kg
D. 33/8kg

Question 17:

• JAMB 1999

The equation of a wave travelling along the positive x-direction is given by;
y = 0.25 x 10^-3 sin (500t - 0.025x).
Determine the angular frequency of the wave motion.

A. 0.25 x 10^-3rad s^-1
B. 0.25 x 10^-1rad s^-1
C. 5.00 x 10²rad s^-1
D. 2.50 x 10³rad s^-1

Question 18:

• JAMB 1999

If a sound wave goes from a cold air region to a hot air region, its wavelength will

A. Increase
B. Decrease
C. Decrease then increase
D. Remain constant

Question 19:

• JAMB 1999

The lowest note emitted by a stretched string has a frequency of 40Hz. How many overtones are there between 40hz and 180Hz?

A. 4
B. 3
C. 2
D. 1

Question 20:

• JAMB 1999

A man stands 4m in front of a plane mirror. If the mirror is moved 1m towards the man, the distance between him and his new image is

A. 3m
B. 5m
C. 6m
D. 10m