Recent content by Dima Petrukhin

Yes, now i got it. Thank you so much!

So we report to one dp as the uncertainty effects the value starting from the 2nd dp?

Would that be 0.093975x10^3 ? I am not sure if i quite get the concept.

1. A student measures the density of a metal and calculates answer to be 8543.2kgm^-1 . The result is accurate to +- 1.1% Which of the following states answer to an appropriete number of sig figs? A 8.543x10^3 B 8.5x10^3 C 9x10^3 D 8.54x10^3 2. Relative Uncertainty = Absolute Uncertainty/...

I should say how close the electrons are to +ve metal ions

1. The question asks why the photodiode is less than 100% efficient.2. hf=work function+KEmax 3.- I reckon this is as some light will not cause e to be emitted if the wavelength of the light is less the needed. -Or some photons will not hit any electron. Is this correct? Thinking about this...

Hi all I was wondering what happens if one slit in youngs double slit is bigger than the other? I recon that the of maxima will rise and in minima, there will be no dark spot, but dim light instead. Is that correct? If not can you please explain what happens? Thanks

http://pmt.physicsandmathstutor.com/download/Physics/A-level/Topic-Qs/OCR-A/5-Newtonian-World-and-Astrophysics/5.3-Oscillations/Set-M/Oscillations%201%20MS.pdf...

thanks for your reply. can you please help me with the 2 bit? why only +ve peaks decrease?

Hello, I don't get it why does the frequency not decrease? As this i assume is damping and frequency must change. And why do only positive peaks decrease?2 Not sure about equations needed. 3.I thought that as it is damped, Energy is lost as heat. Thus speed decreases, therefore, it takes a...