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

6 0

3 years ago

Which object has the most gravitational potential energy?

rjkz [21]

D, a 15kg computer at 0.8m

7 0

3 years ago

2. A boy lifts a 30N toy car 3 meters

GarryVolchara [31]

Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 30 × 3

We have the final answer as

Hope this helps you

6 0

3 years ago

As the frequency of sound waves increases, the wavelength of the sound waves decreases. true or false.

Maru [420]

It is true that as the frequency of sound waves increases, the wavelength of the sound waves decreases.

5 0

3 years ago