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dezoksy [38]
3 years ago
5

Three screens are placed exactly one behind the other. The light of the torch falls on all the three screens. One of the screen

is a bathroom mirror which one?
Physics
1 answer:
Artyom0805 [142]3 years ago
6 0

Answer:

Explanation:

Three screens are placed one behind the other and light falls on all of them from a torch . In this case a mirror can be only the last screen . In case of first or second screen being a mirror , light would not have reached the last screen because the nature of mirror is to reflect the light back.

Hence , the only possibility is that , the last screen is mirror.

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Grindstone: Rotational Dynamics and Kinematics You have a grindstone (a disk) that is 133.0 kg, has a 0.635 m radius, and is tur
Colt1911 [192]

Answer:

Ff = 839.05 N

Explanation:

We can use the equation:

Ff = μ*N

where <em>N</em> can be obtained as follows:

∑ Fc = m*ac   ⇒   N - F = m*ac = m*ω²*R    ⇒  N = F + m*ω²*R

then if

F = 32 N

m = 133 Kg

R = 0.635 m

ω = 95 rev /min = (95 rev / min)(2π rad / 1 rev)(1 min / 60 s) = 9.9484 rad /s

we get

N = 32 N + (133 Kg)*(9.9484 rad /s)²*(0.635 m) = 8390.53 N

Finally

Ff = μ*N = 0.10*(8390.53 N) = 839.05 N

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3 years ago
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VladimirAG [237]

\large\bold{\underline{\underline{Answer:-}}}

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1 year ago
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Something that can not be used up or depleted​
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Answer:

oxygen

Explanation:

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<u>ANSWER</u>

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I really hope this helps i am in middle school and this must be a high school question.

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2 years ago
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