Recent content by RoryP

Hi welcome to PF! Think about what units the eqaution WD=V*q would have then look at the answer you gave us :D

Try thinking about which equations contain Power, and the significance of her weight and vertical height travelled.

You should end up with multiple answers as said before trig functions are periodical. Did the question have any limits? i.e 0<x<2pi/360??

ok brilliant thanks! what is dW? respect to work done?

Hi all, I was doing an A-level Mechanics paper the other day and one of the quesitons was to show that, starting with Hookes law T=(lambda)(x)/(l), show that the energy stored in an elastic rope is (lambda)(e2)/(2l). This was ok, I just said that energy stored would be equal to the sum of the...

i can obtain the correct answer, we just need to see where you got 5.1 seconds from?

just to clear things up how did you calculate 5.1 seconds?

Just revising for my practical physics exam tomorrow and got stuck on this! not sure if its correct, just annpyed me that i was unsure! Homework Statement A vending machine for serving hot drinks has a tank of capacity 7.5 litres, and the manufactuurers say that 45 cups of hot water (at 99o...

Just a quick note to say that the W in hf= Ek + W, is the work function. This equations is usually associated with photo-electric effect =]

ahh i do apologise i had not realized you have calculated the temperature, please ignore the post above

Note it gives you the mass of a single atom This is the amount of moles present After reading the above do you still think this?

Recall the equation for Work Done...

To work out the direction the wire will move you will need to use Flemings left hand rule, the right hand rule is for generators =]

ahhh sweet cheers! =]

Homework Statement The escape velocity is the velocity of an object at the surface of a planet that would allow it to be removed completely from the planet’s gravitational field. Calculate the escape velocity for an object on the surface of Pluto. mass of Pluto: 1.3 *1022 radius of...