3 years ago

Explain how ozone in the atmosphere affects visible light on earth

1 answer:

8 0

Ozone gas in the upper atmosphere absorbs most of the ultraviolet radiation of wavelengths shorter than about 0.25 µm. This is actually a positive thing for us and most other living things, because of the harmful nature of ultraviolet radiation below these wavelengths. The ozone layer is a natural layer of gas in the upper atmosphere that protects humans and other living things from harmful ultraviolet (UV) radiation from the sun.

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A cooling fan is turned off when it is running at 850 rev/min. It turns 1500 revolutions before it comes to a stop. (a) What was

8_murik_8 [283]

Answer

given,

cooling fan revolution = 850 rev/min

fan turns before revolution = 1500 revolutions

$\omega = 850 \dfrac{2\pi}{60}$

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θ = 9424.78 rad

a) using equation of rotation

ω² = ω₀² + 2 α θ

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0 = 89² + 2 x α x 9424.78

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We have: $I=\frac{U}{R}=\frac{120}{20}=6A$

ok done. Thank to me :>

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2 years ago

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