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3 years ago

Electric current in electric bulb is 20 mA, what is the charge flowing through the filament in 4 sec

Physics

1 answer:

anzhelika [568]3 years ago

6 0

Answer:

The charge flowing through the filament is 0.08C

Explanation:

$I=20mA = 0.02A\\t= 4s\\$

Plug your given values into the charge and current formula:

$I=\frac{Q}{t} \\Q=I*t\\Q= (0.02A)(4s)\\Q= 0.08C$

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Which statement supports the giant-impact hypothesis of the moon’s formation

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Answer:

the moon lacks a sizeable iron core

Explanation:

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Match the following vocabulary words with their definitions:

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Correct matching:

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3 years ago

Microwave ovens emit microwave energy with a wavelength of 12.2 cm. What is the energy of exactly one photon of this microwave r

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Answer:

$1.63\cdot 10^{-24} J$

Explanation:

The energy of a photon is given by:

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

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h is the Planck constant

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In this problem, we have a microwave photon with wavelength

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3 years ago

At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?

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Answer:

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Explanation:

We have,

The surface temperature of the star is 60,000 K

It is required to find the wavelength of a star that radiated greatest amount of energy. Wein's displacement law gives the relation between wavelength and temperature such that :

$\lambda T=2.89\times 10^{-3}$

Here,

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Answer: The formula used to solve the problems related to first law of thermodynamics is $\Delta U=Q+W$

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Its implication is any change in the internal energy will be either due to heat energy or work energy.

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For W: Work done by the system is negative and work done on the system is positive.

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