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Nataly_w [17]
3 years ago
13

a car is moving with a constant speed of 20 meters per second.What total distance does the car travel in 2 minutes

Physics
1 answer:
N76 [4]3 years ago
8 0
There are 120 seconds in two minutes, so to find the answer, you multiply 20 x 120 to get 2400 meters.
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A physicist drives through a stop light. When he is pulled over, he tells the police officer that the Doppler shift made the red
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In this case, the Doppler effect equation in terms of wavelength is :

\lambda_{s} = \lambda_{o}\sqrt{\frac{1-\frac{v}{c} }{1+\frac{v}{c} } }       ......(1)

Here \lambda_{s} is source wavelength, \lambda_{o} is observed wavelength, v is speed of the observer and c is the speed of light.

Given :

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Observed wavelength, \lambda_{0} = 555 nm = 555 x 10⁻⁹ m

Substitute these values in the equation (1).

555\times10^{-9} } = 660\times10^{-9} \sqrt{\frac{1-\frac{v}{c} }{1+\frac{v}{c} } }

\sqrt{\frac{1-\frac{v}{c} }{1+\frac{v}{c} } } = 0.84

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v = 1.08 x 10⁷ m/s  

8 0
3 years ago
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