Navigating Physics I Lab Reports: Principal Results & Sources of Uncertainty

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Principal results in a Physics I lab report refer to the key measurements and conclusions derived from the experiment. Sources of uncertainty include various types of errors such as measurement error, observer error, timing error, and instrument error, which can affect the accuracy of the results. It's important to identify and rank these sources based on their impact on the experiment's outcomes. Understanding these concepts is crucial for effectively completing the lab report. Clarity on these points will enhance the quality of the report and improve overall comprehension of the experiment.
Norngpinky
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Hello there, it's my first semester in Physics I, so I'm not exactly sure which is which.

If someone would clarify what these are, that would be wonderful. They're for our lab report.

- Principal Results

- Sources of Uncertainty (in order of importance)



This is our first lab report and we have about 24 hours to finish them. I'm not sure how to solve for both of those.

Thank you =]
 
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Norngpinky said:
Hello there, it's my first semester in Physics I, so I'm not exactly sure which is which.

If someone would clarify what these are, that would be wonderful. They're for our lab report.

- Principal Results

- Sources of Uncertainty (in order of importance)



This is our first lab report and we have about 24 hours to finish them. I'm not sure how to solve for both of those.

Thank you =]

Welcome to PF.

Principal results would be the primary thing you measured and the fundamental relationships and conclusions that can be drawn.

The uncertainties (in no particular order) measurement error, observer error, timing error, instrument error, ... etc.
 
Alright! Thank you! =]
 
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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