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Airida [17]
3 years ago
5

If you wanted to find the area of the hot filament in a light bulb, you would have to know the temperature (determinable from th

e color of the light), the power input, the Stefan-Boltzmann constant, and what property of the filament
Physics
1 answer:
Sladkaya [172]3 years ago
3 0

Answer:

To find out the area of the hot filament of a light bulb, you would need to know the temperature, the power input, the Stefan-Boltzmann constant and <u>Emissivity of the Filament</u>.

Explanation:

The emissive power of a light bulb can be given by the following formula:

E = σεAT⁴

where,

E = Power Input or Emissive Power

σ = Stefan-Boltzmann constant

ε = Emissivity

A = Area

T = Absolute Temperature

Therefore,

A = E/σεT⁴

So, to find out the area of the hot filament of a light bulb, you would need to know the temperature, the power input, the Stefan-Boltzmann constant and <u>Emissivity of the Filament</u>.

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Answer:

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Add on:

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3 years ago
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A ball falling through the air has what?
AysviL [449]
A ball falling through the air has a mass, a density, a volume...it is facing air resistance and is being acted on by gravity...it is accelerating and gaining velocity...and it is increasing in kinetic energy.
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Kinetic Energy - The further the ball fall the more KE it has...until terminal velocity is reach, then KE would become constant. 
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8 0
3 years ago
An inductance L, resistance R, and ideal battery of emf are wired in series. A switch in the circuit is closed at time t = 0, at
Kay [80]

Explanation:

After some time t the current does not passing through the circuit

=>so the back emf is zero

=>here the inductor opposes decay of the circuit

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now we applying the integration on both sides

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here t=0=>i=io

Log io=C

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the option D is correct

3 0
3 years ago
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You exert a 100-N force on a pulley system to lift 300-N. What is the mechanical advantage of this system? How many sections of
Andrei [34K]

Answer:

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You exert a 100-N force on a pulley system to lift 300-N.

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8 0
2 years ago
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