Waec Physics Past Questions For Year 1995
Question 11
Which of the following will reduce the frequency of oscillation of a simple pendulum?
- A. Increasing the mass of the bob
- B. Decreasing the mass of the bob
- C. Increasing the length of the string
- D. Decreasing the length of the string
- E. Decreasing the amplitude of oscillation
Question 12
The pressure of a given mass of gas changes from 200 Nm2 to 100 N m2, while its temperature drops from 127oC to - 73oC. Calculate the radio of the final volume of the gas to its initial volume.
- A. 2.4:1
- B. 2.0:1
- C. 1.2:1
- D. 1.0:1
- E. 1.0:2
Question 13
An air bubble of volume 2 cm\(^3\) is formed 20m under water. What will be its volume when it rises to just below the surface of the water if the atmospheric pressure is equivalent to a height of 10m of water?
- A. 6cm3
- B. 4cm3
- C. 3cm3
- D. 2cm3
- E. 1cm3
Question 14
Hot water at a temperature of t is added to twice that amount of water at a temperature of 30°C. If the resulting temperature of the mixture is 50°C. Calculate t.
- A. 90oC
- B. 80oC
- C. 50oC
- D. 40oC
- E. 30oC.
Question 15
A body of specific heat capacity 450J kg-1 K-1 falls to the ground from rest through a vertical height of 20m. Assuming conservation of energy, calculate the change in temperature of the body on striking the ground level. (g = 10ms-2)
- A. 0oC
- B. 2/9oC
- C. 4/9oC
- D. 9/4oC
- E. 9/2oC
