Answer:
Radio waves have a wavelength between and
While,
X rays have a wavelength between 1m and 10km.
=> It is one of the condition of diffraction that the obstacle (coming in the way) must be comparable with the size of the wavelength.
=> This shows, that radio waves have a wavelength which is comparable with the size of buildings and can really easily diffract through it
=> While, X-rays are big enough to diffract through the wall.
So, if an X-ray technician stands behind a wall during the use of her machine, she will remain safe.
The acceleration of the train at the give initial and final velocity is determined as 10.5 m/s².
<h3>Acceleration of the train</h3>
The acceleration of the train is calculated as follows;
a = Δv/t
where;
- u is initial velocity = 162 km/hr = 45 m/s
- v is final velocity of the car = 540 km/hr = 150 m/s
a = (150 - 45)/10
a = 10.5 m/s²
Thus, the acceleration of the train at the give initial and final velocity is determined as 10.5 m/s².
Learn more about acceleration here: brainly.com/question/605631
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Answer:
46 dgres is the answer
Explanation:
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Answer:
Explanation:
a) Power consumption is 4100 J/min / 60 s/min = 68.3 W(atts)
work done raised the potential energy
b) 75(9.8)(1000) / (3(3600)) = 68.055555... 68.1 W
c) efficiency is 68.1 / 68.3 = 0.99593... or nearly 100%
Not a very likely scenario.