Recent content by CSPTT

1.5*10^9*1,0 = 4.18*m*10 Because I did not know I had to add the 10^3 thing, as the kg would be the unknown in m - or so I figured and I'm still not quite sure why that is wrong... CSPTT

E=c*m*delta T - here are the full details for the answer that the teacher gave: c for water=4.18 kJ/(kg*C°) density for water=1.0*10^3 kg/m^3 V=m/rho (the small p-sign, the Greek sign for r)=36*10^3/1.o*10^3=36 m^3 Thank you for taking a look at it! CSPTT

Thank you! And the thread was very interesting! Good to know that there are shortcuts to remembering the formulas :-) If you have time, I hope you would take a look at my answer to Hootnanny above, though, where I include the actual problem and equation that confuse me - I should have added them...

Thank you so much for clarifying that! There is just one other thing: if you have an equation where the SI unit in question is not given, but is part of the answer when solving "m", does the same reasoning apply - should I always assume that I have to add the number for the SI unit in question...

Many thanks for your answer and I'm sorry I posted twice - I did not know my messages would be moved to the right place by the administrators... Anyway, here is a problem and the equation to solve it where I got stuck because I did not know I had to add the number for the unkown SI unit...

Hi Everyone, I think I posted this message to the wrong forum, so second try... I hope this is the right one? Could someone please explain to me how I know when to use SI units to solve a problem and how to enter these units into an equation - are there any rules of thumb? If I could get a...