2013 - WAEC Physics Past Questions and Answers - page 2
From Newton's first law of motion,
A body of mass 11kg is suspended from a ceiling fan by an aluminum wire of length 2m and diameter 2mm. Calculate the elastic energy stored in the wire [Young's modulus of aluminum is 7.0 x 1010Nm-2, g = 10ms-2, (\pi) = 3.142]`
The velocity ratio of an inclined plane
Which of the following types of thermometer is used for the calibration of other thermometers?
The magnitude of the expansion or contraction of a substance depends on the i. temperature change ii. nature of the substance iii. size of the substance. Which of the statements above are correct?
Highly polished silvery surfaces are
The volume of a given mass of gas at 27oC and 800 mmHg is 76cm2. Calculate its volume at s.t.p
Ice of mass 10g at 5°C was completely converted to water at 0oC, calculate the quantity of heat used. [specific heat capacity of ice = 2.1 Jg\(^{-1}\)K\(^{-1}\), specific latent heat of fusion of ice = 336 Jg\(^{-1}\)]
An electric heater has a resistance of 50(\Omega). When it is immersed in water and connected to mains source, it draws a current of 4.0A. Calculate the heat gained by the water if the heater is switched on for 2 minutes, assuming no heat losses to the surroundings
When salt is dissolved in water, the freezing point of the water