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vagabundo [1.1K]
3 years ago
14

Drawbacks to which energy source include build up of silt or disruption of salmon migration?

Physics
1 answer:
erma4kov [3.2K]3 years ago
4 0
Your answer would be D, Hydroelectric power
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There are 3

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A python can detect thermal radiation from objects that differ in temperature from their environment as long as the received int
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10.52 m

Explanation:

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P = σεAT⁴ where ε = emissivity = 0.97, T = temperature = 30 C + 273 = 303 K, A = surface area of human body = 1.8 m², σ = 5.67 × 10⁻⁴ W/m²K⁴

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This is the power radiated by the human body.

The intensity I = P/A where A = 4πr² where r = distance from human body.

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r = (√P/πI)/2

If the python is able to detect an intensity of 0.60 W/m², with a power of 834.45 W emitted by the human body, the maximum distance r, is thus

r = (√P/πI)/2 = (√834.45/0.60π)/2 = 21.04/2 = 10.52 m

So, the maximum distance at which a python could detect your presence is 10.52 m.

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4 years ago
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