Express the answer using two significant figures

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Reference no: EM139500

Q1. What is the frequency shift of a 68 police radar signal when it reflects off a car moving at 117? (Radar waves travel at the speed of light.)

Express the answer using two significant figures.

Q2. As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier and takes 0.4 to stop.

Reference no: EM139500

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