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skad [1K]
3 years ago
13

The energy of a machine that is transformed into heat:

Physics
1 answer:
Lina20 [59]3 years ago
5 0

Answer:

can be transformed back into mechanical energy

Explanation:

energy never is destroyed it created, just transformed

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A runner exerts a net force of 335 n to accelerate at a rate of 2.5 m/s what is the runners mass
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The operating temperature of a tungsten filament in an incandescent light bulb is 2450 K, and its emissivity is 0.350. Find the
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Answer:

The value is   A =  2.80 *10^{-4} \  m^2

Explanation:

From the question we are told that

The  operating temperature is  T  =  2450 \  K

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 The  power rating is  P  =  200 \  W

Generally the area is mathematically represented as

      A = \frac{P}{ e *  \sigma  *  T^2}

Where  \sigma is the Stefan Boltzmann constant  with value  

      \sigma  =  5.67 *10^{-8} \  W/m^2\cdot K^4

So

     A =  \frac{200}{0.350 *  5.67*10^{-8} *  2450^{4}}

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8 0
3 years ago
When do we use v=2s/t and what does that equation mean?
djyliett [7]

Answer:

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Explanation:

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