SECTION A(25 MARKS)
- State the difference between heat and temperature (1 mark)
- The acceleration due to gravity on Jupiter is about 2.6 times that on earth. A spacecraft has a weight of 24500N on earth.
- What is the mass of the spacecraft? (1 mark)
- What would be the weight on Jupiter? (take acceleration due to gravity on earth as 10N/Kg) (2 marks)
- Use kinetic theory to explain pressure law (3 marks)
- The figure below shows a uniform block of mass 10kg and length 35cm lying on a table. It hangs over the edge of the table by 15cm.
Determine the minimum force that can be applied on the block at point B to make it turn about the edge of the table. (3marks)
- Compare diffusion of chlorine gas into air and into vacuum then explain your comparison (2marks)
- Two identical aluminum rods are placed as shown in the figure below. One rests on a metal block and the other on the wooden block. The protruding ends are heated on a Bunsen burner as shown below:
State with reason in which bar the wax is likely to melt (2marks)
- Figure below shows one method of measuring the specific latent heat of fusion of ice. Two funnels A and B contain crushed ice at 0°C.
The mass of melted ice from each funnel is measured after 11 minutes. The results are shown below. Mass of melted ice in A = 24g, Mass of melted ice in B = 63g. If the power of the heater is 0.024Kw, determine the specific latent heat of fusion of ice. (3marks)
- An ungraduated mercury thermometer attached to a millimeter scale reads 24mm in ice at 0oC and 250mm in steam of water at 100oC. Calculate its reading on a day when the temperature is 30oC. (3marks)
- Sketch a pulley system with a velocity ratio of 4 using 3 pulleys (2marks)
- Explain why a Bunsen burner has a wide heavy base (2marks)
- Why is the capillary bore of liquid in glass thermometer narrow? (1mark)
SECTION B (55 marks)