3 years ago

If a person tries to lift a heavy box for 5 seconds and can't make it budge,the work done on the box is less than zero

1 answer:

3 0

Question not making a sence, Clarify what you wana ask

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Period of months where the weather is the coldest and the days are the shortest.

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Licemer1 [7]

The colder the more likely it is to become a liquid

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tankabanditka [31]

Explanation:

I think for anyone to answer this we need more info on what you want answered. The Sentence Itself doesn't Make Since To Me

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2 years ago

saul85 [17]

Answer:

The wire now has less (the half resistance) than before.

Explanation:

The resistance in a wire is calculated as:

$R=\alpha \frac{l}{s}$

Were:

R is resistance

$\alpha$ is the resistance coefficient

l is the length of the material

s is the area of the transversal wire, in the case of wire will be circular area ( $s=\pi r^{2}$ ).

So if the lenght and radius are doubled, the equation goes as follows:

$R=\alpha \frac{l}{\pi r^{2} } =\alpha \frac{2l}{\pi {(2r)}^{2} } =\alpha \frac{2l}{\pi 4 {r}^{2} }=\frac{1}{2} \alpha \frac{l}{\pi r^{2} }$

So finally because the circular area is a square function, the resulting equation is half of the one before.

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Slav-nsk [51]

The first step is the fusion of hydrogen into Deuterium.

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