Recent content by physicsnerd26

Sorry about that. And thanks. So I should do position/time instead of multiplying them together? Still 16, wouldn't it? Yeah, I get confused between the two most of the time. Can you tell me if my answers above are correct?

I feel terrible for even having to ask this. I'm doing A2 at the moment, and we've gone through these sorts of lessons ever since my early AS days. I'm trying to review my notes cos exams are coming soon and I did some questions, and I'm apparently doing them wrong with what the answers are...

Was it increasing slower or faster than what you expect? What sort of sketch? Like a diagram of my laid out instruments? I did them in different days of the week about 2 weeks ago, I just used the instruments I was given, namely, plug-in power meter, thermometer, large measuring cylinder...

Here's the two that I have atm. Just a side question, when talking about the greatest uncertainty, what points do you have to explore?

I'm kind of confused now, the measurement that I'm assessing when checking the precision is the efficiency, or the factors that I needed to get it? (time, V, I, mass, etc)

But is this one good enough? Which part of it do you need? I'm not too sure on that part. So, can I just make some of them up? I have to submit this on Wednesday, so..

That formula was actually for getting the precision, not uncertainty, sorry, just saw the site again. And I found a way to get the uncertainty: Find the mean, subtract the mean to every piece of result you got on a certain value of the volume of water, then square root it. Is this right? For...

I just realized that, lol. Thanks for clearing that up for me.:redface: So all I need is analysis but the equation that I used is legit? So in this case, the constantly changing amount of voltage in the plug in power metre is a systematic error since you won't really be able to get the exact...

Sorry, what? So which part of it did I do wrong? Can you give an example? Even if it's totally out of context? btw, is the assessment just evaluating the benefits and drawbacks of the instruments that I used?

Exactly right. I assume the results, the data that I gained from the experiment should be used to get the precision, but I don't get what exactly I should do with them. I read a way to calculate the uncertainty last night, basically since I had two sets of results, I was able to do this. so...

I added some more details, sorry for the vagueness.

Homework Statement I'm doing a quality of measurements coursework at the moment where I have to find the efficiency of the different volumes of water. To do this, I needed to use this formula: After measuring the efficiency of different volumes of water, I'm asked to assess the...

Okay, thank you.

I measured that too, the time seemed about right, there was an increasing pattern there, my problem is the voltage and current being in a completely weird order.

Should there be a relationship between them? I kinda get the feeling there should be, just not too sure since I'm not too familiar with the whole voltage and stuff.