9702/12

Physics 9702/12May/June 2014

Cambridge AS Level · Multiple Choice (AS Level) · answer key with instant marking and worked solutions

40
questions
40
marks
60
minutes

Topics D.C. Circuits · Work, Energy and Power · Dynamics · Physical Quantities and Units · Waves · Electricity · +7 more

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Q11MPhysical Quantities and UnitsFree sample

The maximum theoretical power PP of a wind turbine is given by the equation

P=kρAvnP = k\rho Av^n

where ρ\rho is the density of air, AA is the area swept by the turbine blades, vv is the speed of the air and kk is a constant with no units.

What is the value of nn?

Options

A   11
B   22
C   33
D   44

The rest of this paper

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