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abruzzese [7]
3 years ago
13

7) HELP ASAP PLZ PLZ HELP ME I don't know if I am right so if I am not right can you plz help me

Physics
2 answers:
artcher [175]3 years ago
6 0
It’s either “B” or “A”
CaHeK987 [17]3 years ago
5 0
I believe that the answer is B
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Your answer will be 600meters

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One of the predicted problems due to global warming is that ice in the polar ice caps will melt and raise sea level everywhere i
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Explanation: In the pass of time, due the human action on the enviroment, the desappear of the polar ice cover are increasing day after day. We, people, are loosing the prime earth air condicioner sistem, which helps to regulate the climate sistem since the entire history of humanity.

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4 years ago
A beam of light has a wavelength of 549nm in a material of refractive index 1.50. In a different material of refractive index 1.
Rzqust [24]

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someone to check if the answer is correct

6 0
3 years ago
Suppose the maximum safe intensity of microwaves for human exposure is taken to be 1.00 W/m2 . (a) If a radar unit leaks 10.0 W
storchak [24]

Answer:

We must be approximately at least 1.337 meters away to be exposed to an intensity considered to be safe.

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Let suppose that intensity is distributed uniformly in a spherical configuration. By dimensional analysis, we get that intensity is defined by:

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Where:

I - Intensity, measured in watts per square meter.

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If we know that \dot W = 10\,W and I = 1\,\frac{W}{m^{2}}, then the radius is:

r^{3} = \frac{\dot W}{\frac{4\pi}{3}\cdot I }

r = \sqrt[3]{\frac{3\cdot \dot W}{4\pi\cdot I} }

r = \sqrt[3]{\frac{3\cdot (10\,W)}{4\pi\cdot \left(1\,\frac{W}{m^{2}} \right)} }

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We must be approximately at least 1.337 meters away to be exposed to an intensity considered to be safe.

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