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rjkz [21]
3 years ago
6

A beam of ultraviolet radiation, with frequency

Physics
1 answer:
andreyandreev [35.5K]3 years ago
6 0

To develop this problem, we will apply Einstein's relationship which is in charge of the work done with the kinetic energy of the body versus the total energy of the system.

The energy can be calculated as

E = hf

Here,

h = Planck's Constant

f = Frequency

Our values are given as,

f = 2.78*10^{15} Hz ,

W = 3.80 eV

Therefore the Energy is

E = hf

E = 6.625*10^{-34}J\cdot s(2.78*10^{15}Hz)

E = 1.84*10^{-18}J \rightarrow 1 J = 6.242*10^{18}eV

Then,

E = 11.48eV

Applying the Einstein Relation we have that

E = W+KE

KE = E -W

KE = 11.48eV-3.80 eV

KE = 7.68eV

Therefore the maximum  kinetic energy for an electron dislodged fromthe surface by the radiation is 7.68eV

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<h3>What is convective heat transfer?</h3>

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The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas c
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Answer:

The answer is below

Explanation:

A diver works in the sea on a day when the atmospheric pressure is 101 kPa. The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas cylinder. The compressed air quickly cools to its original temperature. Calculate the pressure of the air in the cylinder.

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Boyles law states that the volume of a given gas is inversely proportional to the pressure exerted by the gas, provided that the temperature is constant.

That is:

P ∝ 1/V;   PV = constant

P₁V₁ = P₂V₂

Given that P₁ = initial pressure = 101 kPa, V₁ = initial volume = 1700 L, P₂ = cylinder pressure, V₂ = cylinder volume = 12 L. Hence:

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