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Calculate the threshold frequency for a metal with a work function of 3eV

The equation for work function is: W = hf

So, this is rearranged to: f = W/h where h is planck's constant.

Therefore, if we know the work function...

Answered by Anna W. • Physics tutor

96750 Views

Raya has decided to depreciate her fixed assets. She has a printing press which was worth £500 at cost and is estimated to depreciate in value at 15% a year, Reducing balance method. Calculate the NBV at the end of year 3. Showing your working out.

Cost Price = 500 Year 1 = 500-75 = 425 Year 2 = 425 - 63.75 = 361.25 Year 3 = 361.25 - 54.1875 = 307.0625 Therefore the Net Book Value at the end of year 3 will be £307.06

Answered by Raya R. • Accounting tutor

2705 Views

Show that the sum from 1 to n of 1/(2n+1)(2n-1) is equal to n/(2n+1) by Induction

First we check that this is true for n=1: S₁ = 1/(1x3) which is equal to n/(2n+1) for n=1 therefore S_n= n/(2n+1) is true for n = 1. Next assume that it is true for n=k. S_k

Answered by Jamie F. • Further Mathematics tutor

14808 Views

Why is the Senate important?

The Senate's chief importance comes from the unique powers that Senators have, which make them effective and influential in the policy progress. For instance, a significant power at the moment is filibust...

Answered by Isadora M. • Government and Politics tutor

12580 Views

Why was Charles I unpopular?

Think over the factors at play in society and how Charles I's actions affected them - religion, for instance, had caused difficulty and violence for all the Tudor monarchs since Henry VIII, and this had o...

Answered by Isadora M. • History tutor

13066 Views