​K.C.S.E Physics Q & A - MODEL 2013PP1QN12
State why it is necessary to leave an air space in a closed glass bottle of water when it is to be kept in a refrigerator.
answer
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K.C.S.E Physics Q & A - MODEL 2013PP1QN11
​ Figure 6 (a) and 6(b) show capillary tubes inserted in water and mercury respectively.
It is observed that in water the meniscus in the capillary tube is higher than the meniscus in the beaker, while in mercury the meniscus in the capillary tube is lower than the meniscus in the beaker. Explain these observations.
answer
K.C.S.E Physics Q & A - MODEL 2013PP1QN10
​Figure 5 shows a Bunsen burner.
​Explain how air is drawn into the burner when the gas tap is open.
answer
K.C.S.E Physics Q & A - MODEL 2013PP1QN09
Explain why brakes fail in a hydraulic braking system when air gets into the system.
answer
K.C.S.E Physics Q & A - MODEL 2013PP1QN08
Figure 4 shows a uniform metre rule of weight 1 N with two weights of 0.18 N and 0.12 N suspended from its ends.
​Determine how far from the 0.18 N weight a pivot should be placed in order to balance the meter rule.
K.C.S.E Physics Q & A - MODEL 2013PP1QN07
​Figure 3 shows a piece of wood fitted into a copper pipe and a piece of paper wrapped tightly around the junction.
​It is observed that when a flame is applied around the paper at the junction, the side of the paper around the wood burns first. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2013PP1QN05
State two measurements you would take in an experiment to determine the upthrust of an object which is immersed in a fluid.
State how the measurements in question (5) are used to determine the upthrust of the object.
answer
5. Weight of object in air
Weight of object when fully immersed in fluids 6. Upthrust = weight in air - weight of object in fluid. K.C.S.E Physics Q & A - MODEL 2013PP1QN04
​An object of weight 20 N attached at the end of a spring causes an extension of 0.5 cm on the spring.
(a) Determine the spring constant of the spring. (b) Determine the weight of an object that would cause an extension of 0.86 cm when attached at the end of the same spring. K.C.S.E Physics Q & A - MODEL 2013PP1QN03
​Figure 2 shows some air trapped by mercury in a glass tube. The tube is inverted in a dish containing mercury.
​Given that the atmospheric pressure is 760 mmHg and the height of mercury column in the tube is 600 mm, determine the pressure of the air trapped in the tube in mmHg.
K.C.S.E Physics Q & A - MODEL 2013PP1QN02
State one factor that affects the turning effect of a force on a body.
answers
K.C.S.E Physics Q & A - MODEL 2013PP1QN01
Figure 1 shows part of the main scale and vernier scale of a vernier callipers.
​Record the reading indicated.
answer
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