Physics Past Questions And Answers
A man of mass 50kg ascends a flight of stains 5m high in 5 seconds. If acceleration due to gravity is 10ms−2 the power expended is
- A. 100w
- B. 200w
- C. 400w
- D. 500w
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
Which of the following substances is the most volatile at room temperature?
- A. water
- B. diesel
- C. petrol
- D. kerosine
(a) Define the apparent cubic expansivity of a liquid
(b)(i) Describe with the aid of a labelled diagram, an experiment to determine the apparent cubic expansivity of a liquid.
(ii) State two precuations that should be taken to ensure accurate results.
(c) A density glass bottle contains 44.25g of a liquid at 0°C and 42.02g at 50°C. Calculate the real cubic expansivity of the liquid. (Linear expansivity of glass = 1.0 x 10-5K\(^{-1}\))
View Discussion (0)WAEC 1996 THEORY.jpg)
Musical instruments playing the same note can be distinguished from one another owing to the differences in their
- A) quality
- B) pitch
- C) intensity
- D) loudness
In the wiring of houses, the fuse is connected to the wire coloured
- A. blue
- B. brown
- C. yellow
- D. yellow and green
If a heavy barrel is rolled up a plane inclined at 30° to the horizontal. its velocity ratio will be
- A) 3.0
- B) 3.1
- C) 3.2
- D) 2.0
The rate of cooling of a heated quantity of liquid in an enclosure depends on the
- A. Pressure of the liquid
- B. Temperature in the enclosure
- C. Pressure of the enclosure
- D. Volume of the liquid
When the direction of vibration of the particles of a medium is perpendicular to the direction of propagation of a wave, the wave is said to be--------
- A. longitudinal
- B. transverse
- C. mechanical
- D. a sound wave
If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material? 1/64
- A. 20 years
- B. 10 years
- C. 2 years
- D. 24 years