The continuous stirring in the method of mixtures to determine the specific thermal capacity of a substance ensures
- A. continuous dissipation of heat to the room
- B. uniform distribution of thermal energy to all parts of the mixture
- C. that the thermal energy is confined to the mixture
- D. that there is rapid heat exchange
A mercury-in-glass thermometer read 4cm at ice point and 29cm at steam point. Calculate the temperature when the mercury level is at 9cm
- A. 13oC
- B. 20oC
- C. 33oC
- D. 38oC
An aluminium rod of length 1.8m at 10°C is heated to proceed produce a difference in length of 0.007m. Calculate the temperature to which it is heated. (Linear expansivity of aluminium = 2.3 x 10\(^{-5}\)K\(^{-1}\)
- A. 155oC
- B. 160oC
- C. 169oC
- D. 179oC
The diagram given is used to determine the
- A. boiling point of water
- B. atmospheric pressure
- C. upper fixed point of a thermometer
- D. amount of water in the atmosphere
Which of the following statements correctly defines the boiling point of a liquid? The temperature at which the
- A. saturated vapour pressure equals the atmospheric pressure
- B. molecules leaves the liquid at a rate equal to the rate at which they return
- C. molecules leave the liquid at a rate higher than that at which they return
- D. molecules leave the liquid at a rate lower than the rate at which they return
In the clinical thermometer, the function of the kink is to i. Prevent the back flow of mercury after use. ii. Ensure the back flow of mercury after use. iii. Maintain the thermometric property of mercury. iv. Allow the temperature attained to be read.
- A. i only
- B. i and ii only
- C. i and iv only
- D. iii and iv only
The mouth piece of a telephone handset converts
- A. electrical energy to sound energy
- B. sound energy to electrical energy
- C. sound energy to radiowave
- D. radiowave to sound energy
Resonance occurs when one vibrating object causes a second object to vibrate at its own natural
- A. amplitude
- B. speed
- C. frequency
- D. intensity
When a body is thrown vertically upwards, its velocity at the maximum height is
- A. maximium
- B. zero
- C. double its initial value
- D. half its initial value
A plank is placed along the path on which a wheel barrow containing sand is pushed at a construction site to prevent it from sticking as illustrated in the diagram given. The large area of the plank prevents the wheel barrow from getting stuck by
- A. increasing the reaction on the ground
- B. increasing the pressure on the ground
- C. decreasing the pressure on the ground
- D. decreasing the weight on the ground
A uniform metre rule is balanced on a fulcrum placed at the 35cm mark by suspending a mass of 120g at the 10cm mark. Calculate the mass of the metre rule.
- A. 60g
- B. 80g
- C. 120g
- D. 200g
At a birthday party, the celebrant pops a corked fruit wine. If the cork shoots out of the bottle at an angle of 40o to the horizontal and travels a horizontal distance of 4.50m in 1.25s. Calculate the initial speed of the cork.
- A. 4.2ms-1
- B. 4.7ms-1
- C. 5.6ms-1
- D. 7.1ms-1
The two person of a body undergoing a uniformly accelerated motion are (10s, 10ms-1) and (30s, 50ms-1). On the velocity-time graph pf the body.
- A. 0.5ms-2
- B. 2.0ms-2
- C. 10.0ms-2
- D. 40.0ms-2
The diagram given illustrates a force-distance graph for the motion of a wooden block. Determine the work done on the block when moved through a distance of 5m.
- A. 4J
- B. 15J
- C. 5J
- D. 100J
An object of volume 400cm3 and 2.5gcm-3 is suspended from a spring balance with half its volume immersed in water. Determine the reading on the spring balance. (Density of water = 1gcm-3)
- A. 1200g
- B. 1000g
- C. 800g
- D. 400g
Which of the following substances lowers the surface tension of water?
- A. metal
- B. sand
- C. detergent
- D. paper
A ball is dropped from the top of a tower. Due to air resistance,it reaches terminal velocity. Which of the following statement(s) about its motion is/are correct? i. The acceleration of the ball is zero. ii. The net force on the ball is zero. iii. The velocity of the ball increases.
- A. i only
- B. i and ii only
- C. ii and iii only
- D. i, ii and iii
The diagram given, represents the graph of stress against strain for an elastic wire. The point Q on the graph is the
- A. elastic linit
- B. breaking point
- C. yield point
- D. proportional limit
A student measures the volume of a liquid using a measuring cylinder. What else needs to be measured by the student in order to determine the density of the liquid?
- A. depth of the liquid in the cylinder
- B. mass of the cylinder
- C. mass of the liquid
- D. tempersture of the liquid