Recent content by EskShift

Homework Statement The tungsten cathode in an electron microscope has a work function of 4.5 eV and is heated to release electrons that are initially at rest (near the cathode). The electrons are accelerated by a potential difference that creates a beam with a de Broglie wavelength of 0.040...

Homework Statement The life (in hours) of a particular brand of batteries is a random variable with probability density function given by f(x) = {1/1000e^(-x/1000)}, x ≥ 0, 0 elsewhere. If after 180 hours of operation a battery is still working, what is the probability that it will last at...

Homework Statement Explain carefully the mathematics of Faraday's law of electromagnetic induction. Homework Equations EMF=(∆(BA)) / ∆t

Hey all, i have a summary report coming up which is assessed. I was just wondering if u guys could help out on the know how, terms and all the other stuff to go along with that stuff. Apparently the Summary has a 'prac' layed out like a case study i guess. The teacher said that we would need to...

just wondering if its a sneaky answer or just as simple as put a magnet next to it?

ohh no! i was looking at the wrong equation. mistake on my behalf, i would say its supposed to be the same equation but with -3 at the top? that looks better in my eyes but your opinion would be great!

i don't know if i have really learned all this yet, to me its a really tough question so I am assuming I am not quite there yet lol. but none-the-less, the answer i received on paper was: -6 / (2x - 1)^1/2 + c but from the way i have been going its probably wrong...

ohh i understand. ok well back to my first thoughts, in a way i think i can write it: y = (3 ∫u ^-3/2) / 2 y = (3 ∫u ^-1/2) / 2 * -1/2 y = (3 ∫u ^-1/2) / -1 if that's correct a hint for the next step please?

Ok so thought du/dx was 2, and so its dy/du * 2 = 3/u3/2. That was where i got stuck :P, i thought, well then dy/du must equal 3 / u3/2 / 2 But as you just mentioned, i left out another du. so its 2y = 3∫u3-/2 * du therefore 2y = 3∫u3-/2 * 2 (du = 2 right?) can just you just confirm that's correct?

im still not understanding this, can you please explain how to do it?

I think so, i got: -9 / (2x - 1)5/2 + c That sound right or did i miss something?

Yeah i know what you mean, I am just a little confused as to where the 3/2 goes? Its a multiple choice question and all the answers are very different to what i keep getting.

Homework Statement If dy / dx = 3 / (2x - 1)^3/2 and c is a real constant, then y is equal to... Homework Equations I figured since it is somewhat like the equation 1 / ax + b, then to work it out i must re-work the equation: 1/a LOGe |(ax + b)| + c The Attempt at a Solution i...

Well that gave me about 3000+, and the answer says 0.6 J, so either the answer is a mistype or its the wrong equation.

thats still fairly confusing! the change in length is 0.8m, the original length is 2m, stress is 60,000Pa at point of fracture and Strain is 0.4 at point of fracture, radius of the cylinder is 20cm and i need to find the work done to extend the materials to the point of fracture. Work = Fx...