K.C.S.E Physics Q & A - MODEL 2009PP1QN07
A clinical thermometer has a constriction in the bore just above the bulb. State the use of this constriction.
ANSWER
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K.C.S.E Physics Q & A - MODEL 2009PP1QN06
​Two identical beakers A and B containing equal volumes of water are placed on a bench. The Water in A is cold while in B it is warm. Identical pieces of potassium permanganate are placed gently at the bottom of each beaker inside the water. It is observed that the spread of colour in B is faster than in A. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2009PP1QN04&5
​ Figure 2 shows two cylinders containing a liquid and connected with a tight – fitting flexible tube. The cylinders are fitted with air- tight pistons A and B as shown
​When equal forces, F are applied on the pistons as shown it is observed that piston A moves up while B moves down. Explain this observations
answer
K.C.S.E Physics Q & A - MODEL 2009PP1QN03
A steel needle when placed carefully on water can be made to float. When a detergent is added to the water it sinks. Explain this observation
answer
K.C.S.E Physics Q & A - MODEL 2009PP1QN02
In an experiment to determine the acceleration due to gravity g, a student measured the period, T and length L, of a simple pendulum. For a length L = 70.5 cm, the period T obtained as 1.7s. Given that T = 2phie √ L/g, determine the value of g correct to two significant figures
K.C.S.E Physics Q & A - MODEL 2009PP1QN01
​In an experiment to measure the density of a liquid, a student filled a burette with a liquid to the 0 cm3 mark. Figure 1 shows a section of the burette showing the level of the liquid after 54.5 g of the liquid had been run ou
​Determine the density of the liquid
K.C.S.E Physics Q & A - MODEL 2008PP1QN19
​ a) State the principle of moments.
b) A uniform metal strip is 3.0cm wide, 0.6cm thick d 100cm long. The density of the metal is 2.7 g/cm3. (i) Determine the weight of the strip. The strip placed n a pivot and kept in equilibrium by forces as shown in fig. 13
​(ii) Determine the value of F and R
(iii) X is the distance from the end of the plank to the point of application of force F. Force F is now applied at various points nearer to the pivot so that x increases. Equilibrium is maintained all the time. On the axes provided sketch the relation between force F and x.
​(iv) Give a reason for the answer in (iii) above
K.C.S.E Physics Q & A - MODEL 2008PP1QN18
​(a) Define the term velocity ratio of a machine.
(b) Fig. 12 shows part of a hydraulic press. The plunger is the position where effort is applied while the Ram piston is the position where load is applied. The plunger has cross-section area, a m2 while the Ram piston has cross-section area, a m2.
When the plunger moves down a distance d the Ram piston moves up a distance D.
(i) State the property of liquid pressure on which the working of the hydraulic press works. (ii) Derive an impression for the velocity ratio (V.R) in terms of A and a. c) A machine of velocity ratio 45, overcomes a load of 4.5 x 103N when an effort of 135N is applied. Determine: (i) The mechanical advantage of the machine; (ii) Efficiency of the machine; (iii) The percentage of the work that goes to waste. K.C.S.E Physics Q & A - MODEL 2008PP1QN17
​a) What is meant by absolute zero temperature?
Fig. 10 shows a set up to investigate the relationship between temperature and volume for a certain gas.
b) State two factors that are kept constant, in order to determine the relationship.
c) The graph in Fig. 11 shows the relationship between volume and temperature for the experiment. (i) What was the volume of the gas at 00C?
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