All or some of these topics may be on the exam.
What is Physics?
Observations:
Subjective Objective
Measurements:
Prefixes
Measuring
Fundamental & Derived units
Factor Label
Sig Figs
Labs:
Easy as PI
Not as Easy as PI
Physics Bugs me!
Graphing:
Graph:20 Pts
Graph
Scale 2 pts
Title 2 pts
BLOF 2pts
Axis Label 2pts
Slope 4pts
intercept 2pts
Identification 2 pts
Equation in terms 4 pts
Parent Graphs:
4 from class
Units
Motion in a straight line
Graphical Analysis of motion
Position
Change in position (Displacement)
Velocity
acceleration
Mr. D's Graphs
Vectors vs. scalars
average vs. instantaneous
By Physics Bugs Me, do you mean all the concepts we learned during ALL the buggy labs?
ReplyDelete-Andrew Nazha
Yep... What does the slope of a position vs. time graph tell you? What does it mean when the slope is (-),0,(+)?
DeleteIf the slope goes from (+) to (-) what has to happen?
Noah what is squirtic?
DeleteAndrew I would assume so because there is nothing else on there that talks about it
ReplyDeleteBy Physics bugs me do you think the questions will be about speed, distance, graphing, velocity, ect.
Delete-Taylor Nardone
Also identifying what type of graphs showed up in which situations (like squirtic etc.) i think.
DeleteWhat is prefixes??
ReplyDeleteI'm pretty positive that it means like milli, centi, deci, hexa, and all those other base 10 prefixes :) (I took this class last year)
DeleteOk thank you!
ReplyDeleteWhat exactly are average vs instantaneous?
ReplyDeleteI believe it refers to that recent lesson where we identified speeds and velocities at one point on the series and then the speed and velocity of the whole series
DeleteNoah is right. Instantaneous=one moment. Average=the whole series
DeleteWhat does he mean about "measuring"? Does he mean the units?
ReplyDeleteI think he means to make sure you use the units that we are supposed to do in class --Taylor Nardone
Deleteunits that we *use in class #meterssecondskilograms
DeleteWe also need to know how to convert from the common measuring units. -Katie Cabrera Period 3
DeleteDoes anybody know if Factor Label will be on the midterm?
ReplyDelete-Taylor Nardone
It'll definitely be on there considering we spent a good amount of time on it.
DeleteWe will because we took a test on it and he told us to study it in class. -Katie Cabrera
DeleteWhat exactly is sig figs?
ReplyDeletesignificant figures from the cvs lesson where we created rules for them such as caboose zeroes and nonzeroes and sandwhich zeroes
DeleteI found this really helped
Deletehttp://misterguch.brinkster.net/sigfigs.html
this website gives you examples http://www.wellesley.edu/Astronomy/kmcleod/Toolkit/sigfigs.html#Multdiv
DeleteOk thanks alot.
DeleteWhat is BLOF again? I don't seem to remember but i know we learned it.
ReplyDeleteBLOF stands for Best Line Of Fit. It is a straight line which passes as near to as many of the points plotted as possible.
Delete-Stefania Tutra
what was the term for the curved line that touched most of the points and had lines going to the axes?
DeleteThe curved line is a parabolic function and as it approaches the x-axis, it is known as the asymptote.
DeleteBut what if they are at the end of a number? Like 18536.48000 ?
DeleteSorry wrong post. My computer is freaking out
Deletethanks nazia
DeleteSo the blof is always a straight line?
Delete--Taylor Nardone
I'm not sure if a BLOF is always a straight line because when we did the Not As Easy As Pie lab, we graphed a BLOF that went through the points in a curved motion.
DeleteIt does not always have to be straight...
Deleteor it would be called SBLOF.
Recall not as easy as PIe the graph was a sqrt function which created daughter graph. Then we had to find the parent who was linear.
What exactly is Vectors vs. scalars?
ReplyDelete-Stefania Tutra
vectors have a direction (velocity) and scalars don't (speed)
DeleteWe did a whole things that with that in class, and I'm guessing that he wants us to know what things are considered to be vectors and what things are considered to be scalars.
Deleteother examples of scalars would be time, volume, mass, and distance. if u think about it that makes sense because a single object can't have a direction. more examples for vectors would be displacement and force
DeleteDoes anybody know what he means by average vs. instantaneous?
ReplyDeletei think average refers to the speed or velocity of one point on a series and instantaneous refers to the speed or velocity of the whole series
DeleteIt is the exact opposite of now said. Think of instantaneous as INSTANT. You want the velocity of that one moment. The Average is the velocity of the whole series.
Delete*Noah not now. Autocorrect!
DeleteThanks Makena. Sorry about that
Deletecan someone remind me what a derived unit is?
ReplyDeleteDeriving units is when you determine what unit is used to measure relationships between the fundamental units of Physics from an original equation. For example, Density is mass/volume, and since mass is measured in kg and volume is measured in cubic meters, the derived unit would be kg/m^3.
Deleteso its just not one of the most basic units?
DeleteIt's taking the most basic units (the fundamental units) and creating either more basic or more complex units.
DeleteWhat is identification?
ReplyDeleteMr. Crane said he would have to ask Mr. D about it because he wasn't sure either. for now i wouldn't worry about it. -Katie Cabrera
DeleteOk cool. Thanks
DeleteYou answered my question too, thanks.
DeleteTo be clear, placeholders are not significant... right?
ReplyDeleteNo they aren't because they tell the value, not the precision of the number. -Katie Cabrera Period 3
DeleteWhat if they are at the end of a number. Like 3.3700 ?
DeleteThose are significant because the last 0 is a caboose and the one next to it sandwich because it's between a caboose and a nonzero number.
DeleteWhat are the prefixes that we have to know?
ReplyDeleteCenti, Milli, Mega, and Kilo are the most important.. The others will probably not be on there but study it anyway.
DeleteWhat is "equation in terms"?
ReplyDeleteEquation in terms is when you use the correct variables in the equation y=mx+b. Instead of using x and y.. Use the actual terms that they mean.
DeleteLike when we did the one where we measured circumference, the formula was C=3.14d. (The 3.14 was pie) instead of y=mx
DeleteWhat exactly are the "fundamental & derived units"?
ReplyDeleteDerived units is like when you have meters times meters equals meters squared, which is area. Fundamental units are time, mass, meters, temperature, amps, candella, and moles.
ReplyDeleteSo an example of derived units would be if x squared times x squared would equal x to the forth?
DeleteDerived units are when you take the Fundamental Units of Physics to create other units. Yes, that's right Makena.
DeleteMr. Crane, are the lessons you and Mr. D'Amore do the same? Like the stuff I did in his class, are they the same or should I talk to you?
ReplyDeleteMost of them are. Theres a couple I'm unsure about though. Check your notes.
DeleteWe take the same test Kyle so we must learn the almost same things.
DeleteWhat is an example of prefixes?
ReplyDeleteLike the demi, cemi, milli-that kind of prefix. Measurement prefixes
Delete~Makena
Why is mass a scalor and why is weight a vector? arent they the same thing?
ReplyDelete-Ari Matlick
Mass is a scalar because it has no direction.
DeleteWeight is a vector because gravity is a direction. Weight=mass X gravity.
Hope this helps!
They aren't the same thing because scalars can't be negative while vectors can, and scalars don't include direction while vectors do. Basically, most of the fundamental units of physics are scalars.
DeleteSome of this stuff I don't remember learning/hearing in Mr. D's class before my schedule changed. Everyone on here seems to know... but what's a factor label & an example of one? Sorry.
ReplyDeleteFactor labels help you convert units.
DeleteIf you want to find out how many seconds are in 60 minutes you could do this:
60 minutes X (60 seconds/minute) = 3600 seconds
There are 60 seconds in each minute, and the minutes cancel out so you are left with 3600 seconds.
Does graphical analysis of motion just mean position v time graphs?
ReplyDeleteWe learned velocity vs Time graphs too so they might be on there
DeleteYo Giunts it means you have to analyze the graph by finding mins and max, Slope, percent error, linear or non linear, velocity, ect.
DeleteYours truly, Taylor Nardone (Mr. President)
Graphical Analysis of Motion also means understanding what a situation would look like like graphed. So basically, something like the 12 Graphs of Physics.
DeleteIs there somewhere on the blog or online to get the prefixes we learned so I dont study unneeded ones?
ReplyDeleteHe just said to study centi,mili,deca,and kilo.
Deleteso do we need to know the ones like candella and moles etc ?
DeleteI don't think so...
DeleteDoes anybody remember the percent of error formula?
ReplyDeleteOn the T vs. (square root) L graph we did I have down calculation error= absolute value of (0.201-m) over (0.201) and that whole thing multiplied by 100. Where m=slope. Sorry if that's a little confusing. I'm pretty sure that's it but I would check with someone else just in case.
DeleteAliena thats what I have too but on the circumference vs. diameter graph I have %error= absolute value of |pi-m| over pi and that whole thing multiplied by 100... so does it depend on what kind of graph it is ? or are those the only two different equations and you use the one that you said Aliena except when dealing with something that involves pi such as circumference and diameter?
DeleteThe formula for percent error is your result - accepted value
Delete___________________________ X 100
accepted value
THe accepted value has to be something given I guess because you wouldnt know it if you found your own.
Should we know what moles, candelas, kelvins, and amperes measure?
ReplyDelete-Chuck Vicente
Do you know if we`re getting a reference sheet with like the conversions on it ?
DeleteYes, he told our class that we would be getting a reference sheet for the factor label. Chuckie, you should know what each of those represent as a fundamental unit of Physics and whether they're a scalar or vector.
DeleteI believe that it will be helpful to know them but I am not one hundred percent positive on whether we will need to know them or not.
Delete^ -James Gallagher
DeleteIs there any special rules for dividing and multiplying sig figs ? I know for adding and subtracting you can only have the least amount of sig figs in your answer right ? I just dont remember if there is any special ones for multiplying and dividing...
ReplyDeleteI can't find the rule but I am pretty sure the amount of sig figs stay the same
Delete-Chuck Vicente
Do you mean like just whatever the answer comes out as or the lowest in the equation like when adding and subtracting?
DeleteWhen its multiplication and division I'm pretty sure you round
DeleteYou guys are thinking of something else most likely. When you add and subtract SigFigs, you have to align the numbers by place value, and cut it off where they don't align anymore. That's when you decide whether to round up or leave it as it is. When multiplying and dividing, you round it to the least number of SigFigs from the numbers you are given.
DeleteExamples:
1.966
3.4222
_______
5.4082, but it would be 5.408 because that's where the last place values align.
1.45 x 2.2 = 3.78 = 3.8
Should i know the standards for distance, time, mass, moles, candela, kelvin, and ampere?
ReplyDeleteHannah Wray
Is there somewhere I can find what moles, candela, kelvin and ampere are ? I wasnt there for that lesson I remember that...
Deleteim not sure, we made a chart in class that was the symbol, unit, standard, and definition of distance, time, mass, moles, candela, kelvin and ampere
DeleteFor example for distance, i have the symbol is m, the unit is meters, the standard is a platnum meridian bar (one meter), and the definition is the amount of space between two objects. In my chart i have the symbol, unit, standard, and definition for each fundamental unit, (distance, time, mass, moles, candela, kelvin, and ampere)
DeleteYou can just search Google for the fundamental units of Physics and it's right there for you in the links. Or, you can borrow my notebook if you want to.
DeleteAre we going to have to do anything with an instantaneous point? or just know what it means?
ReplyDeletei do not know if we have to do anything with it, but i think we have to know what it is and the difference between average and instataneous
DeleteHannah Wray
Can you explain that to me ?
Deletethe average speed of something is different than the speed at an instant. for example, on the distance vs. time graph we answered questions on in class. The average speed of red is 4 meters per second. but if the question was what is reds speed at 5 seconds, the speed is 0 because it is not moving. the difference is average is the total of the distance or amount of time, and instantaneous is at a specific moment.
DeleteHannah Wray
What is identification on a graph and is a best line of fit only drawn for a linear graph?
ReplyDeleteHannah Wray
I have no idea what identification is and I believe that it is only for linear but I could be wrong. I would double check with someone else just to make sure.
ReplyDeleteI think identification is identifying which pionts you used to find slope
DeleteIdentification is picking your two points you will use to plug into the slope formula (y2-y1 over x2-x1)
Delete--Taylor Nardone
is motion in a straight line what the first graph looked like in the physics bugs me
ReplyDeleteYep, just like that i think.
DeleteHe mentioned he would probably give us linear data to graph. Otherwise we wouldnt be able to find the slope because itd be curved.
DeletePetals around a rose will not be on the midterm, but the concept of minimums, maximums, and other observations will appear
ReplyDeleteWhat do we have to know about units and what units do we have to know?
ReplyDeleteHannah Wray
we need to know milli, deca, and the other ones. They should be in your notebook under "Quistion of Scale"
DeleteIm really confused about identification? Does anyone know what it even is?
ReplyDeleteI was wondering the same thing... Also what does it mean by equation in terms ?
DeleteI think identification is identifying the pionts you use to find slope slope,, but i might be wrong. Does that soound right? Like the two pionts (x1,y1 and x2,y2)
Delete-hanah
Deleteyeah that sounds right. Its better than nothing. and equation in terms is when u replace the x and y values with the correct axis labels like distance and time.
DeleteOr maybe he means identisying things with things that. It is a pretty general term, so someone should probably ask him just to be sure.
Delete-Kevin Meglathery
I take back what I said. I didn't know it was in the graph category.
Delete-Kevin Meglathery
What is the formula for percent error?
ReplyDeleteThe percent error formula is the absolute value of 3.14-your slope over 3.14 and after you take the absolute value you multiply by 100
Delete--Taylor Nardone
Percent Error for anything is the absolute value of the actual amount (ex. pi or gravity) minus your experimental amount(what you calculated in the experiment), all divided by the actual amount. Then, you multiply that number by 100.
Deletehe said that if we need to calculate the percent error, he'll give us the answer to plug in the formula that Nazia just said
DeleteOk thats good news and thanks
Deletewhat does "measuring" mean? as in encompass like knowing how to measure?
ReplyDeleteMr. Craine said there will be lines that we have to measure with a ruler in cm
Delete--Taylor Nardone
Do we need to memorize the different parent graph equations ?
ReplyDeleteI don't think we have to memorize the equations, but I would double check with someone on that. I would definitely make sure to understand what each parent graph looks like and how the x and y values are proportional with one another.
DeleteI think he said we have to match the parent graph with its equation.
DeleteI really think you guys should be reading through all of the comments and seeing what advice everyone is giving each other, because a lot of you are asking the same question multiple times.
ReplyDeletedoes 100 have 1 or 3 sig figs?
ReplyDelete3
DeleteThis comment has been removed by the author.
Delete3 the zeros count as sig figs unless the number starts with a 0
DeleteI do believe you are incorrect, you might be thinking of "100." which is different then "100". There is nothing sandwhiching the zeroes in, therefore having only one sig fig.
DeleteThe number 100 without a period at the end will only contain 1 sig fig. The two zeros are as we say "place-holders."
Delete-James Gallagher
100 only has 1 SigFig, not 3. The zeros count as a SigFig only if they're right to the decimal point. If you asked how many Significant Figures are in 100. then it would be 3. The decimal point changes it.
ReplyDeletethank you for clarifying that Nazia
Deletebut if zeroes only count as sig figs to the right of the decimal point why would there be 3 in 100. ?
DeleteDidn't see this before I posted on the last topic, you beat me to it. :P
DeleteWhat is the difference between multiplying and dividing sig figs?
ReplyDeleteThere is no difference between multiplying and dividing for sig figs. The rule is the same: you multiply or divide like you normally would, but your answer can only contain the lowest amount of sig figs as the numbers you divided/ multiplied by. An example would be 2.5 x 1.33 = 3.325, but because 2.5 is only 2 sig figs your answer is 3.3
ReplyDeleteSo distance is the total amount of linear space covered. But what if you have a graph that starts at zero, goes to 10, and then back to zero. Would the distance be 10 or zero? And can you have negative distance like if the slope is negative?
ReplyDeleteThe distance would be 20 because you add 10 for the way up and 10 for the way down, but the displacement would be zero because the graph is moving in the negative on the way down so you add 10 for the way up and -10 for the way down and get zero.
DeleteThe distance would be 10 because that's the total amount of linear space covered, and distance does not include direction. The displacement would be 0 because it includes direction, and describes how far away something is from the starting point. You're question is a perfect example of scalars and vectors. Distance can't be negative (because it doesn't include direction), which makes it a scalar. Displacement can be negative (it includes direction like velocity), which makes it a vector.
Deleteso if it goes in a negative direction at some point and you are calculating distance, then you just completely disregard the negative parts?
DeleteI dont think you disregard the negative. Rember in class Mr. Crane went 10 files forward and them 10 tiles back. His tottal distace would be 20 because you have to add the distance both ways
DeleteThat's the only way you can get 20...
Delete10+ -10= 0 displacement
10+ I 10 I =20 distance
In order to get 20 we had to ignore the negative.
You can also do this by definition. (Displacement) is change in position. In your example, the one from class. It's still 0 because I didn't go anywhere.
But I traveled a total space of 20... (Distance)
Crane
https://www.khanacademy.org/math/arithmetic/decimals/significant_figures_tutorial/v/significant-figures
ReplyDeletethese videos helped me a lot with sig figs so if you are still having troubles you should check them out.
Wow that video really helped! I was really confused about SigFigs, but that video cleared things up for me.
ReplyDeleteCan someone tell me what daughter graphs are? I know that parent graphs are those four on the paper we got awhile ago.
ReplyDeleteDaughter graphs would be branched off of the parent graph. For example, the linear parent graph function is y=x. So any daughter graph would be y=mx+b. They're similar in the way they look but have different starting positions and slopes. The same goes for all the parent graphs.
Deleteim still a little confused on velocity. can anyone explain it to me? i understand that it is speed with direction but can't you not have speed without going in a certain direction? otherwise you would just be at a standstill.
ReplyDelete~Gianna B
Speed is a scalar, so it is always positive. Its like how distance is a scalar, and you can't have negative distance.
DeleteVelocity is a vector, meaning it includes direction. Speed is/can be calculated using distance and time. Distance and time are scalars and can't be negative, so neither can speed.
Velocity is/can be calculated using displacement and time. Displacement is a vector, so it can be negative. Time is a scalar and cannot. Since one of them can be negative, so can velocity.
-Billy Potts
Speed ignores direction. Like distance ignores direction. Speed =(Change in)distance(is +)/(Change in)time (is +). Neither has direction (they can't be negative)so Speed can't either.
Delete-Billy Potts
thanks! ok so direction just means that it can go backwards? (or be negative?)
ReplyDelete~Gianna B.
How do you do factor lable method with speed such as converting miles per hour into meters per second?
ReplyDelete--Taylor Nardone
What is a prefix and what will we need it for? Also, what does it mean when it says identification?
ReplyDelete-James Gallagher
Was there a curve on the midterm?
ReplyDelete