Recent content by WY

oh i see now! sorry - I wasn't thinking properly! Thanks again :)

thanks for the quick reply - but i don't quite understand how this ties in with finding the emf using the change in flux over the change in time.

Hey I'm wondering if someone can help me out with this question. Q: In order to measure the magnetic fields produced by the power lines carrying 50Hz alternating current, a coil consisting of 1500 turns of area 5cm^2 as constructed. Suppose that there is a single power line carrying a...

Thanks for the help! when i originally did it i used (88-10)/7 to try and standardise it - giving me a ridiculous number. So with the normal distribution N(10,7) what should I now do with those - I'm still kind of confused...

Hi I'm wondering if someone can help me out on this question as to how to go about doing it: X_1, X_2... X_7 are independent random variables represnting a random sample of size 7 from the normal N(10, 7) distribution. Find to 3 dp probablitity that the sample total exceeds 88. I tried to...

Hi, I have been looking at some discussion questions in a textbook and there is a question about blood transfusion from inverted glass bottle rather than a flexible bag. The question" What would happen if blood were transfused from an inverted glass bottle rather than a flexible bag? I...

Hey I am completely stumped as to how to find the density in this following question so I can answer part (c) Q: At a bottling plant soft drink flows in a pipe at a rate that would fill 200 375mL cans per minute. At point 1 in the pupe the gauge pressure is 152 kPa and the crossectional area...

Hey, I have no idea where to start, for this question. I know that I will probably have to use vector and scalar product and use the trig identity tan^2(theta)=sec^2(theta)-1 - and of course partial derivatives Question: In order to determine the angle theta which a sloping plane ceiling...

Hey, I have no idea where to start, for this question. I know that I will probably have to use vector and scalar product and use the trig identity tan^2(theta)=sec^2(theta)-1. Question: In order to determine the angle theta which a sloping plane ceiling makes with the horizontal floor...

Thanks for replying :) But I'm not to sure what you mean - i don't think i am very familiar with that theorem... could you elaborate a little? hehehe

Hey I'm not to sure on how to approach this problem - I think I have to use induction but I don't know where to start! Question: Let A be an mxn matric. Suppose that Ax=0 has only one solution, namely x=0. Show that m >= n Thanks for the help in advance

hey I was just wondering what would happen if you had a length of string with varying densitities with one end fixed to a wall and you sending a pulse down it. Would the waves travel faster along some bits or change amplitude at all or do something i haven't mentioned? Can anyone enlighten...

a multiple of the amplitude - so would i have to divide it by 2 to find the amplitude?

Hi I'm attempting this question and I'm wondering if this is the correct way of going about it or if I'm completely off track: For lunch you and your friends decide to stop at the nearest deli and have a sandwich made fresh for you with 0.300 kg of Italian ham. The slices of ham are weighed on...

oh I see! thanks for clearing that up now - its all crystal clear now!