3 years ago

What variable does each of the symbols in the equation represent?

Physics

1 answer:

taurus [48]3 years ago

4 0

Answer:

Pls give the equation and for what is that equation for?

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A street lamp weighs 150N. It is supported by two wires that form an angle of 120° with each other. The tensions in each wire ar

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Answer:

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3 years ago

A typical 100-watt light bulb consumes 100 j of energy per second. If a light bulb converts all of this energy to 400 nm light

VladimirAG [237]

The missing question is: how many photons are produced per second?

Answer:

$2.0\cdot 10^{20}$

Explanation:

The energy of a photon is given by

$E_1 = \frac{hc}{\lambda}$

where

h is the Planck constant

c is the speed of light

$\lambda$ is the wavelength of the photon

In this problem, the photons have wavelength

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$E_1 = \frac{(6.63\cdot 10^{-34})(3\cdot 10^8)}{400\cdot 10^{-9}}=4.97\cdot 10^{-19} J$

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Therefore, the number of photons emitted per second is

$n=\frac{E}{E_1}=\frac{100}{4.97\cdot 10^{-19}}=2.0\cdot 10^{20}$

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4 years ago

C. Describe how a manometer could be used to find the pressure of the laboratory gas supply.

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Answer:

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