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What is the threshold frequency of a photon to excite and then emit photoelectrons from a material?

Use the photoelectric effect equation which shows conservation of energy between photons, electrons and the material that the electron is being freed from, hf = phi + KE max . Defining terms: h is Planck's c...
CS
Answered by Charles S. • Physics tutor
7899 Views

1 Using Kodak as an example, is organisational culture the most important cause of business failure? (40 marks)

Summary of my essay answer: In order to determine the most significant cause of business failure it is of relative importance to consider the critical environmental factors both internally and externally whi...
JL
8259 Views

How can I improve my oral presentations and my accent?

The first tip is to slow down! Way too often, you are so eager to get the oral presentation over with that you start to blurt out absolutely everything you’ve learnt in 30 seconds and then all your words get...
AW
Answered by Adele W. • French tutor
2362 Views

What are the roots of y=x^2+5x+6 ?

Roots = where line touches x-axis. Set equation equal to 0 as y=0 at the x-axis. Now we need to solve for the x values at which y=0. Quadratic is now 0=x^2+5x+6. Factorise quadratic: 0=(x+3)(x+2). Now you ca...
SW
Answered by Sam W. • Maths tutor
7786 Views

Do I need to memorise lots of quotations for my AQA English exam?

For your AQA English exam, you are assessed on four key categories. Each of these categories is called an ‘Assessment Objective’ - an AO. The first of these AOs, AO1, is to ‘read, understand and respond to t...
LH
Answered by Lauren H. • English tutor
4690 Views