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1.7.1a Energy stores and energy transfers

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Question 22

The mass of air hitting the blades of a wind turbine each second is 2.4 × 10⁴ kg.

The speed of the air is 5.0 m/s.

The density of air is 1.2 kg/m³.

Which row in the table gives the volume of the air hitting the blades each second and the kinetic energy of this air?

	Volume of air each second / $m3\text{m}^3$	Kinetic energy each second / $J\text{J}$
A	$00020\,000$	$000300\,000$
B	$00020\,000$	$000600\,000$
C	$80028\,800$	$000300\,000$
D	$80028\,800$	$000600\,000$

Row A

Row B

Row C

Row D

Markscheme

1.7.1a Energy stores and energy transfers Questions

IGCSE
Physics
1.7.1a Energy stores and energy transfers

229 exam-style questions on CIE IGCSE Physics 1.7.1a Energy stores and energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.

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