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3 years ago

Is the battery sends a current of 10 A through a circuit for one hour, how many coulombs will flow through the circuit?

1 answer:

7 0

1 Ampere = 1 coulomb/second

1 hour = 3,600 seconds

1 coulomb/second = 3,600 coulomb/hour

10 Amperes x 1 hour = 36,000 coulomb/hour

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Particles in which state of matter are the most likely to interact with each other to cause a chemical reaction?

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f1= -350cm or -3.5m

f2= 22.1cm or 0.221m

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3 years ago

The maximum wavelength that an electromagnetic wave can have and still eject electrons from a metal surface is 542 nm. What is t

Veseljchak [2.6K]

Answer:

2.295 eV

Explanation:

maximum wavelength, λ = 542 nm = 542 x 10^-9 m

The work function of the metal is defined as the minimum amount of energy falling on the metal so that the photo electrons just ejects the surface of metal.

$W_{o}=\frac{hc}{\lambda }$

where, h is the Plank's constant and c be the speed of light

h = 6.634 x 10^-34 Js

c = 3 x 10^8 m/s

$W_{o}=\frac{6.634\times 10^{-34}\times 3\times 10^{8}}{542\times10^{-9} }$

$W_{o}=3.67\times 10^{-19} J=\frac{3.67\times 10^{-19}}{1.6\times 10^{-19}} eV$

Wo = 2.295 eV

Thus, the work function of this metal is 2.295 eV.

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3 years ago