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oee [108]
3 years ago
14

Calculate the light intensity 1.45 m from a light bulb that radiates 100 W equally in all directions.

Physics
1 answer:
ivanzaharov [21]3 years ago
5 0

Answer:

I = 3.785 W/m²

Explanation:

given,

distance from the light, r = 1.45 m

Power of bulb = 100 W

The area is that of a sphere with a radius equal to the distance from the light bulb.

The formula for the area of a sphere of radius 1.45 meters is:

A = 4 π r²

A = 4 x π x 1.45²

A = 26.42 m²

Intensity of the light is equal to

I = \dfrac{P}{A}

I = \dfrac{100}{26.42}

      I = 3.785 W/m²

Intensity of the light at 1.45 m is equal to I = 3.785 W/m²

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4 0
3 years ago
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scoundrel [369]

Answer:

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3 years ago
(a) What is the ionization energy of a hydrogen atom that is in the n = 6 excited state? (b) For a hydrogen atom, determine the
crimeas [40]

Answer:

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E=\frac {-13.6}{6^2}\ eV

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7 0
3 years ago
A body oscillates with simple harmonic motion along the x axis. Its displacement varies with time according to the equation x =
frutty [35]

Answer:

θ = (7π / 3) rad

Explanation:

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