Find the maximum kinetic energy of the photelectrons

Assignment Help Physics
Reference no: EM13489631

The work function for potassium is 2.25eV. A beam with a wavelength of 400nm and an intensity of 10^-9W/m^2. Find

a) the maximum kinetic energy of the photelectrons.

b) the number of electrons emitted per meter squared per second from the surface, assuming 3% of the incident photons are effective in ejecting electrons.

Reference no: EM13489631

Questions Cloud

What was the change in the volume of the gas : The pressure of an ideal gas remains at 200 Pa while 1000 joules of heat are removed and its internal energy increases by 2000 joules. What was the change in the volume of the gas
Determine work produced by the turbine : A simple ideal Rankine cycle which uses water as the working fluid operates it's condenser at 45 degrees C. determine Work produced by the turbine
Who is an internal auditor of acme corporation : Audit Scope and Purpose - Needs to be developed based on the audit findings. Need paragraph or few lines on each. What is the scope of the audit and what is the primary purpose. Remember the definition of internal auditing.
Calculate the change in specific entropy of air : Calculate the change in specific entropy of air as it is expanded from 2500kPa and 550 degrees C to 120kPa and 65 degrees C
Find the maximum kinetic energy of the photelectrons : The work function for potassium is 2.25eV. A beam with a wavelength of 400nm and an intensity of 10^-9W/m^2. find the maximum kinetic energy of the photelectrons
Explain the calculated molecular weight of an unknown : What effect would each of the following have on the calculated molecular weight of an unknown. Would the calculated value be higher than the true value. Lower. Same
Devise a smart objective for your virtual project : Before embarking on any project, setting an overall target objective can assist you to focus on the main purpose and aims of the project. You are required to devise a SMART objective for your virtual project.
Enhance effectiveness and efficacy of functions and services : Provide recommendations to propose constructive actions to enhance the effectiveness and efficacy of functions and services.
How far does the lighter fragment slide : An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. How far does the lighter fragment slide

Reviews

Write a Review

Physics Questions & Answers

  Find the difference between the number of waves

A light wave travels from point A to point B in vacuum. hat is the difference between the number of waves between A and B with and without the glass plate in place

  What is the speed of the car

At rest, a car's horn sounds at a frequency of 480 Hz. The horn is sounded while the car is moving down the street. A bicyclist moving in the same direction with one-third the car's speed hears a frequency of 470 Hz. What is the speed of the car?

  Find how fast are you moving with respect to the moon

As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 115 bpm, How fast are you moving with respect to the Moon

  Find the temperature of the source

A certain light source is found to emit radiation whose peak value has a frequency of 8.28 Ã- 1014 Hz. Find the temperature of the source

  Q1 how numerous years would it take a thermally insulated

q1. how numerous years would it take a thermally insulated one-million-kilogram chuck of granite to undergo a 1000k

  Find the retarding force

A swimming pool has dimensions 32 m 11 m and a flat bottom. When the pool is filled to a depth of 2.10m with fresh water, what is the force caused by the water on the end that is 11m.

  How much heat is released by the water

When the water turns to ice during the night, heat is free into the plants, thereby giving them a measure of protection against the falling temperature. Assume a grower sprays 7.64 kg of water at 0°C onto a fruit tree.

  What should be amount of heat absorbed by high temperature

Throughout a hard sneeze, your eyes may shut for 0.44s. If you are driving a car at 98 km/h during such a sneeze, how far does the car move during that time.

  Find work done during the compression

Suppose 2.5 mol of an ideal gas is taken from a 6m3 to a volume of 3 m3 via an isothermal compression at 30 0C. Find work done during the compression

  How much time does it take to lift the piano

A 3.0x10 ² kg piano is being lifted at a steady speed from ground level straight up to an apartment 10 m above the ground. How much time does it take to lift the piano

  At what temperature will the mixture reach equilibrium

48 g of ice at -10oC is added to 150 g glass filled with 250 g of water at 20oC. At what temperature will the mixture reach equilibrium

  Find the initial acceleration

A friend is working on a biology experiment and needs to make an electric field of magnitude 460 {rm N/C} at a distance of 10 {rm cm} from the central portion of the large nonconducting square plate 5.2 {rm m} on each side.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd