Recent content by dagg3r

Sy/Y = (0.2/5.85) + (0.1099555934/0.3723445134) yes you are correct the sum is 0.329 but i had Sy= 0.7182971382 which is the sum multiplyed by Y so 0.329*2.18=0.7182971382 which is the uncertainty in Y... but i don't know if its right or not the way i went about it all. so is their...

Hi guys, i am trying to work out the uncertainty of this equation Y = (AC-CX)/(B+X) and i am needed to work out the uncertainty in Y. values for these are: Y=2.18 UNCERTAINTY UNKNOWN A=29m Uncertainty in A denoted (Sa)=3mm B=710mm Uncertainty in B denoted(Sb)=3mm...

:mad: A radioactive material emits 2 gamma rays with 2 energies 50 keV and 200 keV with equal probabilities the detector system has a quantum efficiency of 100% and 50% respectively at these 2 energies and the pulse heights are 1.0 mV and 4.0mV respectively. The pulses are input into a 512...

hi this is a hard algebra qestion i have these 2 formulas 12-x^2 -2xy = 0 12-y^2 - 2xy = 0 for some reason x and y are both 2 how do you get this i tried and got y= 6/x -0.5x tried to sub into second one but gets messy any way to do this on a calculator by any chance i have a...

Maximum Volume Hard! hey guys got this maximum volume question so bloody hard ! i got most of the steps right but got stuck on the last section (V) 1. A closed box has a surface area of 18 square metres. let the dimensions of the three sides x,y,z and let volume be V (i) write the volume V...

hi all I am struggling to on these types of questions ill post here 1. find the equation of the plane containing the points A(-1,2,1) B(0,2,3) and C(4,-1,2) i tried to plot this on a x,y,z and maybe i rearranged to get formula n=CA * CB but its wrong heh no idea how to do this anyone can...

hi guys need some help on diff eqn, I've done the workingout and answers but not sure if they are right mind if someone can check them for me thanks Find the general solution of the differential equation dy/dx - 2y = e^(5x) i found I(x) = e^ integral (-2 dx) = e^(-2x) as I(x) =...

hi all i got this operational amplifer question was wondering if anyone can help out 1. a feedback amplifier has a closed loop gain of 100, and the negative feedback is 0.8% of the output signal. the opamp has an open loop gain which is considerable less then the ideal value of infinity. a)...

3. A tennis ball is served horizontally from 2.4 m above the ground at 30m/sec a) Find its velocity (V) at any time t seconds b) Find its position vector (r) at any time t second a) v= 30i - gtj b) i integrated and got position vector as p= 30ti(2.4-.5gt^2)j is that it?

HI GUYS i just have some hard problems on partial differentiation... hope you guys can help out 1. find "day z / day y" its the funny backwards 6 symbols instead of the normal differntiation symbole if z=4y^3 * sqrt(x) - ln(4xy^3) + 2x i did this: i diffenriated 4y^3 * sqrt(x) with...

1. A RLC circuit is used in a radio to tune into an FM broadcasting station at 99.7 Mhz. The resistance in the circuit is 12.0 ohm, and the inductance is 1.40 uH (micro Henry) what capacitance should be used? this question is tricky what i tried to do is used XC=1/wC where C is capacitance...

hi all, can someone explain to me if i were to theoretically calculate current using an ammeter in small units eg micro amp's 10^-6 and physically use an ammeter to obtain results why do they differ greatly? and also when i am using a cathode ray oscilloscope (CRO), when i am measuring...

hi can somebody just breiefly list me some points about ammeters and how they are inaccurate and why when measuring in current in nano and also about the cathode ray oscilloscope how when we plot voltages it is inaccurate and why. thanks just basically want to know the limitations of...

:cry: hi i got 2 questions here fairly confusing was wondering if i can get some help thanks 1. consider a series RLC circuit in which R is an incandescent Lamp C is some fixed capacitor and L is a variable inductance. The source is 240 V ac. explain why the lamp glows brightly for some...

1. Find a vector equation for the line that passes through the points P1 (5,2, -3) and P2 (2, -1, 7 ) how would i do this? just 5i+2j-3k - (2i -1J + 7k) 3i +3j -10k? looks a bit simple most likely wrong 2.Find the distance between the plane with equation x + y -4z = -15 and the plane...