K.C.S.E Physics Q & A - MODEL 2005PP2QN07
​(a) What is meant by radioactivity
(b) With an aid of a labeled diagram explain the working of Geiger Muller tube as a detector of radiation (c) In an experiment to determine the half of a certain radioactivity substance, the activity in disintegrations per minute was measured for sometime. Table 1 shows the results obtaine 
​On the grid plot a suitable graph and sue it to determine the half life t ½ of the substance
(d) At time t = 40 minutes, the activity of a sample of a certain radioactive isotope with a half life 12 minutes if found to be 480 disintegration per minute. Determine the time which activity was 3840 disintegrations per minute
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K.C.S.E Physics Q & A - MODEL 2005PP2QN06
​(a) Define the term angular velocity
(b) A body moving with uniform angular velocity is found to have covered an angular distance of 170 radians in t seconds. Thirteen seconds later it is found to have covered a total angular distance of 300 radians. Determine t. (c) Fig 8 shows a body of mass m attached to the centre of a rotating table with a string whose tension can be measured. (The device for measuring the tension is not shown in the figure) 
​The tension, T on the string was measured for various values of angular velocity, w. The distance r of the body from the centre was maintained at 30cm. Table 1 shows the results obtained.
(i) Plot the graph of T (y- axis against w2)
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FORM I - PHYSICS SYLLABUSFORM II - PHYSICS SYLLABUSTOPICS
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M.A NyamotiMy passion is to see students pass using right methods and locally available resources. My emphasis is STEM courses |
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