K.C.S.E Physics Q & A - MODEL 2010PP1QN04
​A paper windmill in a horizontal axis was placed above a candle as shown in figure 2.
When the candle was lit the paper windmill begun to rotate.
Explain this observation.
answer
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K.C.S.E Physics Q & A - MODEL 2010PP1QN03
Some water in a tin can was boiled for some time. The tin can was then sealed and cooled. After some time it collapsed. Explain this observation.
answer
K.C.S.E Physics Q & A - MODEL 2010PP1QN02
A stopwatch started O.50s after the start button was pressed. The time recorded using the stopwatch for a bail bearing falling through a liquid was 2.53s. Determine the time of fall.
answer
K.C.S.E Physics Q & A - MODEL 2010PP1QN01
​Figure 1 shows a vernier calipers being used to measure the internal diameter of a tube.
Record the diameter of the tube.
answers
K.C.S.E Physics Q & A - MODEL 2009PP2QN19
​Figure 12 shows a set up for observing interference of waves from two sources S1 and S2. The points C and D represent positions of the constructive and destructive interference respectively as observed on the screen
​(a) If the observation was made in a ripple tank, describe:
(i) How the constructive and destructive interferences are identified (b) Explain how the constructive interference C and the destructive interference D patterns are produced. Draw: (i) The line joining all points where waves from S1 and S2 have traveled equal distance. Label it A (ii) The line joining all points where waves from S2 have traveled one wavelength further than the waves from S1. Label it B. K.C.S.E Physics Q & A - MODEL 2009PP2QN18
​(a) It is observed that when ultra- violet radiation is directed onto a clean zinc plate connected to the cap of a negatively charged leaf electroscope, the leaf falls
(i) Explain this observation (ii) State why this observation does not occur if the electroscope is positively Charged (iii) Explain why the leaf of the electroscope does not fall when infra- red radiation is directed onto the zinc plate (b) State the effect on the electrons emitted by the photoelectric effect when:
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