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Pepsi [2]
3 years ago
6

Why is a decrease in Earth’s ozone harmful to life?

Physics
1 answer:
zavuch27 [327]3 years ago
8 0

Most ozone resides in the stratosphere (a layer of the atmosphere between 10 and 40 km above us), where it acts as a shield to protect Earth's surface from the sun's harmful ultraviolet radiation. With a weakening of this shield, we would be more susceptible to skin cancer, cataracts and impaired immune systems.

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Under what conditions does q, the heat evolved or absorbed by the system in a physical or chemical process, equal the change in
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Answer: When w=-P\Delta V

Explanation:

According to first law of thermodynamics, energy can neither be created nor be destroyed. It can only be transformed from one form to another.

\Delta H=\Delta E+P\Delta V

\Delta E=q+w

\Delta H = change in enthalpy

P = pressure

\Delta V = change in volume

\Delta E=Change in internal energy

q = heat absorbed or released

w = work done on or by the system

\Delta H=q+w+P\Delta V

Thus for \Delta E=q+w , w=-P\Delta V

The heat evolved or absorbed by the system in a physical or chemical process, equal the change in enthalpy of the system when w=-P\Delta V

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How to find the magnitude of a centripetal force?<br>(formula)​
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Answer:

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Explanation:

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the magnitude f of the centripetal force is equal to the mass m of the body times it veloctiy squared v^2 divided by the radius r of its path

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3 years ago
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