Physics Past Questions And Answers
A gas with initial volume of 2 X 10-6m3 is allowed to expand to six times its initial value at constant pressure of 2 x 105Nm-2. The work done is
- A. 2.0J
- B. 4. 0 J
- C. 12.0 J
- D. 2.4 J
Which of these is not a second class lever?
- A. sugar tongs
- B. claw hammer
- C. plier
- D. wheelbarrow
The mass on a loaded spiral spring oscillates vertically between two extreme positions P and R equidistant from the equilibrium position Q. Which of the following statements about the system is not correct
- A. the momentum of the mass is maximum at Q
- B. the elastic potential energy of the spring is maximum at Q
- C. the kinetic energy of the mass is maximum at P
- D. the total energy of the system is always constant
A balloon containing 546cm3 of air is heated from 0oC to 10oC. If the pressure is kept constant, what will be its volume at 10oC?
- A. 526cm3
- B. 546cm3
- C. 556cm
- D. 566cm3
The image of an optical pin placed at the principal focus of a concave mirror will be formed
- A. between the principal focus and the pole
- B. at the centre of the curvature
- C. between the principal focus and the centre of curvature
- D. at infinity
An object weight 10N immersed in a liquid displaces a quantity of the liquid. If the liquid displaced weighs 6N, determine the upthrust of the object
- A. 20N
- B. 10N
- C. 6N
- D. 4N
(a) Define elastic limit
(b) State Hookes laws of elasticity
View Discussion (0)WAEC 2005 THEORYA uniform metre rule of mass 90g is provided at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark, determine m
- A. 72g
- B. 102g
- C. 298g
- D. 504g
The equation of a wave traveling along the positive x-direction is given by; y = 0.25 x 10−3 sin (500t - 0.025x). Determine the angular velocity of the wave motion.
- A. 0.25 x 10−3rads−1
- B. 0.25 x 10−1rads−1
- C. 5.00 x 102rads−1
- D. 2.50 x 103rads−1
A uniform cylindrical hydrometer of mass 20g and cross sectional area 0.54cm2 floats upright in a liquid. If 25cm of its length is submerged, calculate the relative density of the liquid. (Density of water = 1 gcm-3)
- A. 1.54
- B. 1.48
- C. 1.25
- D. 0.80