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1 answer:
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Distance=speed times time
speed=5mph=5
time=30mins=30/60hr=1/2hr
so
distance=speed times time
he will run 2.5 miles in 30 mins at the speed of 5mph
speed=5mph=5
time=30mins=30/60hr=1/2hr
so
distance=speed times time
he will run 2.5 miles in 30 mins at the speed of 5mph
Answer:
It corresponds to 1mm-10 mm range.
Explanation:
- Electromagnetic waves (such as the millimeter-wave radiation) travel at the speed of light, which is 3*10⁸ m/s in free space.
- As in any wave, there exists a fixed relationship between speed, frequency and wavelength, as follows:
- Replacing v= c=3*10⁸ m/s, and the extreme values of f (which are givens), in (1) and solving for λ, we can get the free-space wavelengths that correspond to the 30-300 GHz range, as follows: