Recent content by cakeislife

I was going over some past papers ( OCR Physics A2 ) and I came across this question about cosmic microwave background radiation-the topic I seem to be struggling with the most :/ and I wasn't sure how to structure my answer. It's worth 5 marks. The question is : Describe the important...

@marcus, no, its fine, it was my fault for not posting this in the H/W section :/ is there any way I can move this thread?

Homework Statement 1. A small pebble of mass 50g is dropped into a pond and falls vertically through it with an acceleration of 2.8ms^-2. Assuming that the water produces a constant resistance, find its magnitude. 2. A lift of mass 500kg is lowered or raised by means of a metal cable...

@Simon Bridge, yes , it was meant to be a hyphen!

@phinds I'm confused, where did it start from then? @marcus I'm not writing an essay, I have exams, so I'm revising the points from my specification, and I just happened to stumble on this point. Secondly , I don't live on cake, but cake always makes everything better, it's the light at the...

@Simon Bridge Ok, I understand that the whole universe is not at that temperature, its the average temperature right?! :S I still don't understand the concept of the temperature though? I understand hot objects give out radiation of short wavelengths, which have very high energies and cool...

Ok so I'm a bit confused as to how to attempt to answer this question? Describing its significance vs explaining its significance? Here is my attempt, please be ruthless when correcting me as I feel like there are some gaps in my knowledge and misconceptions I have: Where I put '/' I...

Homework Statement I'm having a slightly hard time with a topic we are studying at school 'the evolution of the universe'. My first question relates to the Big Bang Model itself; does the Big Bang Model itself describe the evolution of the universe after the Planck time up to this point...

Just wondering one more thing, for my graph, would it be too awkward to put '5, 10' ,15 ,20 ,25,30' every 3 squares for the 'number of oscillations' on the x axis? If I do it every two squares, it looks slightly weird and takes up 3/4 of the page :S

Oh god, I didn't calculate what ln(A) was, probably should have... Oh ok, great! Ok, thank you for taking the time to help me, I definitely understand it better now!

Yes, sorry my bad. Ahh ok, I understand. So if it is 2.4cm then my ln(A)= 0.056 , for example? Also I just have one more question In(A) has no units, right? :S

I am plotting InA against n :) Ok so for resolving the equation, did you simply rearrange it into the form y=mx+c and then from my calculated values of the gradient and y intercept I can just state In(A0)= my y intercept and then determine A0 from that? And λ= +gradient ( since my gradient...

Homework Statement Hi, so my question is about a damped simple harmonic motion experiment The experiment is as follows: A 30 cm ruler with a needle attached to it is clamped to a bulldog clamp. The needle is placed in a beaker of water so that it is just inside the water ( by about...