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lara31 [8.8K]
4 years ago
13

You are driving on the freeway when a police officer records a shift of −7 nm when he or she measures your speed with a radar gu

n that operates at a wavelength of 0.1 m. How fast were you going?
Physics
1 answer:
Mademuasel [1]4 years ago
7 0

Answer:

1.0493 m/s

Explanation:

Formula for this problem is

\frac{Shift F}{F} =\frac{2V}{C}

Where,

Shift F = -7 nm = -7 × 10^{-9} m

F=0.1 m

C= speed of light = 2.998 × 10^{8}

V= Object's (he/she) speed

Putting values;

==> -7 × 10^{-9}  ÷  0.1  = 2V ÷ 2.998 × 10^{8}

==> -7 × 2.998 × 10^{-1} = 2V × 0.1

==> - 2.0986 = 0.2 V

==> V =-1.0493 m/s

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Explanation:

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You place a penny on a turntable at a distance of 14.3 cm from the center. The coefficient of static friction between the penny
S_A_V [24]

Answer:

Time will be 2.13 sec

Explanation:

We have given that distance r = 14.3 cm ==\frac{14.3}{100}=0.143m

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