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E&m Mec Exam 14

E&m Mec Exam 14

E&m Mec Exam

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Quiz Questions And Answers

What does Y represents in the chemical reaction below? 03 + Y -- > 02 +0

UVB
UVA
None of the above

CFC's (chloro-fluoro-carbons) were used in...

Foams
Anti-oxidants
All of the preceding

The ozone layer was formed about...

100 million years ago
1 billion years ago
10 million years ago

Put the following waves in order of increasing wavelength... I. FM radio II. AM radio III. Microwaves

1 billion years ago
III, I, II
100 million years ago

The_____________is the unit of wavelength.

Meter
Second
Hertz

The half-life of radon is about...

3-4 days.
3-4 years.
All of the above.

In the equation given as C=f lambda. What does the variable lambda represent?

Speed of light
Wavelength
Frequency

What is the number of neutrons in uranium 235 nucleus?

235
143
238

Which of these greenhouse gases has the highest percentage composition in the atmosphere?

Methane
Water vapor
Ozone

It is estimated that the percentage of lung cancer deaths due to radon is

5%
40%
10%
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