ON21 P23 Q2 Base Units | Oct/Nov 2021 | Cambridge A Level 9702 Physics
9702/23/O/N/21: (a) State what is meant by work done.
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(b) Use your answer in (a) to show that the SI base units of energy are kg m2 s–2.
(c) A metal rod is heated at one end so that thermal energy flows to the other end. The thermal energy E that flows through the rod in time t is given by E = cA(T1 – T2)t/L where A is the cross-sectional area of the rod,
T1 and T2 are the temperatures of the ends of the rod, L is the length of the rod, and c is a constant. Determine the SI base units of c. #ASunitsP1 #Lv1
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