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Mnenie [13.5K]
3 years ago
10

A car completes a journey in 2 hours. Its average speed over this journey was 45mph. Calculate the distance travelled by the car

in miles.
Physics
1 answer:
HACTEHA [7]3 years ago
8 0

Distance = average speed ×time

Distance = 45 × 2

Distance = 90 miles

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Light waves are electromagnetic waves that travel at 3.00 Light waves are electromagnetic waves that travel 108 m/s. The eye is
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(a) 5.45 \cdot 10^{14} Hz

The relationship between frequency and wavelength of an electromagnetic wave is given by

c=f \lambda

where

c=3.00 \cdot 10^8 m/s is the speed of light

f is the frequency

\lambda is the wavelength

In this problem, we are considering light with wavelength of

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Substituting into the equation and re-arranging it, we can find the corresponding frequency:

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(b) 1.83\cdot 10^{-15} s

The period of a wave is equal to the reciprocal of the frequency:

T=\frac{1}{f}

And using f=5.45 \cdot 10^{14} Hz as we found in the previous part, we can find the period of this wave:

T=\frac{1}{5.45 \cdot 10^{14} Hz}=1.83\cdot 10^{-15} s

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DochEvi [55]

Answer:

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Explanation:

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Anna71 [15]

Answer:

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