Recent content by Puchinita5

Homework Statement My homework involves calculating the amount of energy the Earth receives from the Sun in a given year. I actually have the answer, but what I'm confused with is that the calculation says that the Sun "sees the cross section of the Earth, a circle". So in the calculation, we...

okay cool, I guess I was taking the word "observe" too seriously... The first 4 can be explained somehow in a geocentric model right? I figure it must because these were all things observed back then and they seemed content with the geocentric model despite these observations. The analemma one...

Homework Statement I wasn't sure where the most appropriate place to post this question is. But anyway. Which of these, if any, can be used as evidence that the Earth revolves around the sun. 1. The phases of the moon 2. The seasons 3. analemma of the sun 4. solar and lunar eclipses 5. the...

so i think when i was adjusting the time to adjust for the initial falling time, from the y intercept of the v vs t plot, i had definitely done that wrong, and now my values are close... 997 cm/s^2 for the v vs t method, 978 for the p vs t polynomial fit method, and 921 for the p vs t^2 linear...

Okay here is my data. I'm still so confused. Sorry for being so slow with this!

Hmmm I can't seem to find a good way to paste data here. Is there a way to add a table? :( So, maybe I should plot total distance over total time traveled? Instead of the little increments. Hmm, maybe that is what he meant, and I just misunderstood, it's not a super well written lab manual.

Hmmm, well I know that the actual velocity at each point won't be the average over a segment. But that would make me think that plotting distance over time would give a better estimate, except my distance versus time^2 plot gives me a value that isn't as close to the known value of g than v...

This is what the lab instructions tell me to do, so I can't really change it.

I'm taking the average velocity between two points and assigning it as the velocity of the second point. So if I have s0 is at 0cm, s1 is at 1.2 cm s2 is at 2.6 cm then velocity v0 = 0 v1 = (s1-s0)/(dt) = (1.2 - 0)/(1/60.) = 72 cm/s v2 = (s2-s1)/(dt) = (2.6 - 1.2)/(1/60) = 84 cm/s So then I...

But I guess, either way, assuming all my data is correct, and I have a column in excel for position, velocity, time, and time-squared, what would be the advantages or disadvantages of plotting 1) velocity vs time and calculating g from the slope of the best fitted line, 2) position vs t and...

wait, hmmm the whole adding y intercept thing isn't right. we add the time at which the best fitting line intersects V = 0, sorry, my brain is fried.

We basically just plot against relative times, since we know that every spark happened every 1/60 seconds, so the time column in excel is just 0, 1/60, 2/60, 3/60 etc... and then when we plot the average velocities vs time, we fit a line, and then the y intercept we add back to each of the...

basically, we are taking the distance between two points, and diving by 1/60 to get the velocity between those points. The first point is at first taken to be at time 0, but then when we plot V vs t, we take the y intercept and add this to all the time values in excel. Then plot position versus...

So I did a lab where we are calculating the acceleration due to gravity using a variety of methods. For two of the methods, we have an object attached to a magnet, then the magnet is turned off so the object is in free fall and it makes a spark/mark every 1/60th of a second on a piece of tape...

I can't seem to find the answer I'm looking for on this, or at least one I understand. Can someone explain why a reaction will proceed if the binding energy of the reactants is larger than the products? I would assume that larger binding energy means the reactants are more stable and so will...