1997 - JAMB Physics Past Questions and Answers - page 3

A mass of a liquid at 30^oC is mixed with a mass of the same liquid at 70^oC and the temperature of the mixture is 45^oC. Find the ratio of the mass of the cold liquid to the mass of the other liquid.

What happens when a gas expands at constant temperature?

Ripples on water and light waves are similar because both

Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz?

The colours seen in the thin films of oil on the road and in soap bubbles are due to

If the load at the end of a sonometer wire is immersed in a bucket of water, the original fundamental frequency of the wire could be restored by

A boy on looking into a mirror observed that his face appeared to have grown bigger. The boy must have been looking at a

Light of velocity 3 x 10⁸ms^-1 is incident on a material of reflective of index n. If the velocity of light is reduced to 2.4 x 10⁸ms^-1 in the material, what is n?

The electromagnetic waves that are sensitive to temperature changes are

Three electric cells each of e.m.f 1.5V and internal resistance of 1.0(\Omega) are connected in parallel across an external resistance of (\frac{2}{3})(\Omega). Calculate the value of the current in the resistor