How Do I Calculate Uncertainty in Electrical Circuit Measurements?

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To calculate uncertainty in electrical circuit measurements, it's essential to apply the appropriate equations for resistance, voltage, current, and power. Common formulas include R = V/I for resistance and P = I^2R for power. For total resistance in parallel circuits, the equation 1/Rtotal = 1/R1 + 1/R2 + 1/R3 is used, and uncertainty can be derived from the individual resistances. Understanding how to propagate uncertainties through these equations is crucial for accurate reporting. Properly calculating these uncertainties will enhance the reliability of the lab report.
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uncertainty equations??

can anyone help me here I'm dying over this! we did a lab and tomorrow I'm handing in my report, the last thing i have to do is find the uncertainties for my data, but i don't know what the uncertainty equations are! for example, one equation is R=V/I, or Rtotal=R1+R2+R3 , E=IVt, P+I^2R, 1/Rtotal=1/R1 +1/R2 +1/R3....any help?!??
 
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ok, i think i may have discovered how to do some of these, except maybe this one :
1/Rtotal=1/R1 +1/R2 +1/R3
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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