Recent content by zanyzoya

Thanks for your help kuruman, I think I’ve got it now.

Hmm we can’t use suvat equations as acceleration is not constant, we could use average acceleration =change in velocity/time but we don’t know time... hmm

Hi all Can anyone please help me with Q14 (attached) as you can see I am getting 167000N however the correct answer is 83000N Many thanks ZanyZoya

Thanks Dr Claude Re your first point, my understanding is as follows: As the water cools down it will loose heat equal to mc delta T, also heat will by lost to surroundings and to the cup. Some of this heat which is lost by the water is given to the ice to initially cause a change in state and...

Homework Statement An ice cube of mass 0.01.kg at a temperature of 0 degrees Celsius is dropped into a cup containing 0.10kg of water at a temperature of 15 degrees Celsius. What is the max estimated change in temperature of the contents of the cup? SHC of water = 4200J per kg per kelvin...

Thanks for the help

2PV/RT moles in each container. Therefore a total number of 4PV/RT moles in the system. Hence After opening 3P2= 4P I.e. P2= 4/3 P Am I right?

Thanks for your help with that mjc 123 and lychette, it makes much more sense now. :smile:

Homework Statement X and Y are two gas bottles that are connected by a tube that has negligible volume compared with the volume of each bottle. There is a valve in the tube that is initially closed. X has a volume of 2V and contains hydrogen at a pressure of p, Y has a volume V and contains...

I have been pondering. Why is it that we use the rms speed in the equation Ek = 1/2 m vrms2, as opposed to just the mean speed2

Ah I see, thanks. Later on we are asked to find the strangeness of particle X. I guess strangeness wouldn't be conserved during the weak interaction and therefore you could not answer this question. Hence another reason the interaction must be due to the strong force.

for example in beta decay the weak force is responsible even though there are no leptons on the lhs and only on the rhs.

Thanks for that. And am I right in thinking that either the strong or weak force could be responsible as only hadrons are involved, ie no leptons exist on either side of the equation? If there were leptons involved on either side then only the weak force could be responsible and not the strong?

Please can you help, I have seen an exam question which asks which interaction is responsible for the following ... Pi+ + proton >>>>> K+ + unknown particle X The options for the answer include both the weak and the strong force. The actual answer is the strong force. What I would...