Hurricane Irma

[hater]

Damn those Cubans got d best hurricane emergency system in the world

They even evacuated the dolphins

Run circles around our emergency system

[hater]

[Mark Celibate]

I took AP physics in 11th grade out here in California. No pre-ap bull here.

In the compe ive school districts, I think AP Physics I is actually taken sop re year since there are three of them (1, 2, and C) just to clear way for the others. Although tbh, I've heard Physiics II is not a valuable class so I've often seen Soph - AP Physics I, Jun - AP Chem, Sen - Physics C. This is mainly those that know they're doing Engineering early on.

[Mark Celibate]

Damn those Cubans got d best hurricane emergency system in the world

They even evacuated the dolphins

Run circles around our emergency system

Irma BTFO by Cuba

BTFO
T
F
O

[baseline bum]

Anyone check Jeff's latest feed? I just started watching and he's got three storms with tornadoes that he's showing off out the car window as he's driving down the highway, I guess to try to get to them. I think he said he was 30 ESE of Naples.

[UNT Eagles 2016]

I took AP physics in 11th grade out here in California. No pre-ap bull here.

they don't let you do that in TX without previous physics experience/coursework. Either you have to have had regular physics, pre-AP physics, or college credit physics at the junior college.

[UNT Eagles 2016]

Irma torn apart by Cuba, down to a minimal cat 3... BUST?!??

[baseline bum]

Irma torn apart by Cuba, down to a minimal cat 3... BUST?!??

Like Harvey was a bust?

[pgardn]

they don't let you do that in TX without previous physics experience/coursework. Either you have to have had regular physics, pre-AP physics, or college credit physics at the junior college.

Yes they do in Texas as of 3 years ago as well as the rest of the nation.

Its called AP Physics 1.

It requires no previous physics course and can give a student credit for college (algebra based) physics. I found this out from another co worker when I thought his kid was taking AP Physics B, which no longer exists. And based on what I saw of some practice MC questions it's actually tougher conceptually than AP physics C (Calculus based HS physics)

[baseline bum]

Yes they do in Texas as of 3 years ago as well as the rest of the nation.

Its called AP Physics 1.

It requires no previous physics course and can give a student credit for college (algebra based) physics. I found this out from another co worker when I thought his kid was taking AP Physics B, which no longer exists. And based on what I saw of some practice MC questions it's actually tougher conceptually than AP physics C (Calculus based HS physics)

HS Algebra based physics courses should be tougher than physics using calculus, since calculus is the natural language of physics.

[pgardn]

HS Algebra based physics courses should be tougher than physics using calculus, since calculus is the natural language of physics.

Actually no because you are relegated to easier math problems in Algebra based physics. You can still take slopes and areas as long as they are easy. And Calculus based physics in HS actually has some differential equations, the change of charge in a capacitor, air resistance... It's a bit strange but I have helped kids with both.

I just found it interesting that the conceptual part was more difficult in the algebra based MC, not necessarily the FR.

[Mark Celibate]

they don't let you do that in TX without previous physics experience/coursework. Either you have to have had regular physics, pre-AP physics, or college credit physics at the junior college.

Things have changed, brah. AP 1 just requires Algebra so you can take it by Soph year although knowing some lrecal could be beneficial for vectors. In the good school districts, preap physics doesn't exist anymore but preap Chem does and is required before AP Chem

[pgardn]

Things have changed, brah. AP 1 just requires Algebra so you can take it by Soph year although knowing some lrecal could be beneficial for vectors. In the good school districts, preap physics doesn't exist anymore but preap Chem does and is required before AP Chem

Yes.

[pgardn]

Damn those Cubans got d best hurricane emergency system in the world

They even evacuated the dolphins

Run circles around our emergency system

Thats important if you live in shacks made of driftwood.
And they rely on the US to inform them of paths intensity and what not.

Good try though with the Cuban paradise.

[baseline bum]

Actually no because you are relegated to easier math problems in Algebra based physics. You can still take slopes and areas as long as they are easy. And Calculus based physics in HS actually has some differential equations, the change of charge in a capacitor, air resistance... It's a bit strange but I have helped kids with both.

I just found it interesting that the conceptual part was more difficult in the algebra based MC, not necessarily the FR.

Easier math doesn't make easier problems though. Seeing derivatives formalized in a calc class really helps a lot of the concepts in early mechanics click IMO. I personally felt completely lost in algebra based physics, trying to memorize formulas that we had to take on faith. It's one of the same reasons I didn't like freshman chemistry, since you don't have the tools to understand wavefunctions and such at that stage. But once you know calc the concepts seem almost obvious in a freshman mechanics course.

Also I don't see how any high school physics course could be discussing differential equations involving air resistance in any meaningful way considering they're nonlinear due to the friction term proportional to the square of speed that makes them solvable only numerically. Even something as simple as throwing a ball in the air goes from the easiest ODE ever to requiring MATLAB/C/etc once you throw in a non-negligible air resistance term. No more elegant and symmetric parabolic trajectory.

[UNT Eagles 2016]

Yes they do in Texas as of 3 years ago as well as the rest of the nation.

Its called AP Physics 1.

It requires no previous physics course and can give a student credit for college (algebra based) physics. I found this out from another co worker when I thought his kid was taking AP Physics B, which no longer exists. And based on what I saw of some practice MC questions it's actually tougher conceptually than AP physics C (Calculus based HS physics)

oh okay, I graduated before that, so there's that

AP Physics 1 / A = "Mechanics" or "University Physics" -- but will also be accepted as the physics requirement for pre-health professional tracks
AP Physics 2 / C = "Electricity & Magnetism" or "University Physics II" -- usually an unnecessary class to take if you're NOT studying to be an engineer or physics major.

[UNT Eagles 2016]

Things have changed, brah. AP 1 just requires Algebra so you can take it by Soph year although knowing some lrecal could be beneficial for vectors. In the good school districts, preap physics doesn't exist anymore but preap Chem does and is required before AP Chem

So it now requires algebra 2 or just algebra 1? Because I had algebra 1 pre-ap done in middle school with a 99% grade.

That's a damn shame because I would have rather gotten, say, AP physics (along with AP biology instead of pre-AP biology) out of the way freshman year when I was isolated socially and motivated to work my ass off in school instead of junior year when I hit a real lull and was more interested in doing things with friends and going out with girls. I ended up getting a B+ (88) my first semester of pre-AP physics and dropped down to regular physics for the second semester.

[pgardn]

Easier math doesn't make easier problems though. Seeing derivatives formalized in a calc class really helps a lot of the concepts in early mechanics click IMO. I personally felt completely lost in algebra based physics, trying to memorize formulas that we had to take on faith. It's one of the same reasons I didn't like freshman chemistry, since you don't have the tools to understand wavefunctions and such at that stage. But once you know calc the concepts seem almost obvious in a freshman mechanics course.

Also I don't see how any high school physics course could be discussing differential equations involving air resistance in any meaningful way considering they're nonlinear due to the friction term proportional to the square of speed that makes them solvable only numerically. Even something as simple as throwing a ball in the air goes from the easiest ODE ever to requiring MATLAB/C/etc once you throw in a non-negligible air resistance term. No more elegant and symmetric parabolic trajectory.

They are forced to ask easier problems from a math point of view because you don't ask them to do real derivatives or integrals. And yes they most certainly do ask problems in HS AP Physics C that need introduction to differentials. I have seen them with my own eyes.

And algebra physics from a kinematic point of view only requires memorizing delta x/t = v and deltaV/t = a

All the kinematic equations can be derived from these. Also they must realize (v f + vo)/2 = v avg as long as accel is constant.

Then F= ma and learn how to draw free body diagrams. You have to memorize the equation for gravitation and electrical force in C as well as these equations can't be derived from simple ideas concerning kinematics. Even work and momentum can come from kinematic sand F = ma. Oh, mu for friction. Almost All the equations are on the all 3 AP exams anyways. Using them properly is a whole different ability.

Look at the 13 min mark of this very good video for Physics C in HS. This guy is really good imo, just found it. There are others for capacitors as well. And they are not difficult, but they are 1st order differentials.

http://aplusphysics.com/wordpress/ap...ial-equations/

[baseline bum]

They are forced to ask easier problems from a math point of view because you don't ask them to do real derivatives or integrals. And yes they most certainly do ask problems in HS AP Physics C that need introduction to differentials. I have seen them with my own eyes.

And algebra physics from a kinematic point of view only requires memorizing delta x/t = v and deltaV/t = a

All the kinematic equations can be derived from these. Also they must realize (v f + vo)/2 = v avg as long as accel is constant.

Then F= ma and learn how to draw free body diagrams. You have to memorize the equation for gravitation and electrical force in C as well as these equations can't be derived from simple ideas concerning kinematics. Even work and momentum can come from kinematic sand F = ma. Oh, mu for friction. Almost All the equations are on the all 3 AP exams anyways. Using them properly is a whole different ability.

Well Newtonian gravitation and electrical forces can't be derived period, as they're experimental results. Though you actually can derive magnetism from the electric field and the postulates of special relativity. Purcell's E&M book has an awesome derivation of the magnetic field due to a wire carrying a steady current.

[pgardn]

Well Newtonian gravitation and electrical forces can't be derived period, as they're experimental results. Though you actually can derive magnetism from the electric field and the postulates of special relativity. Purcell's E&M book has an awesome derivation of the magnetic field due to a wire carrying a steady current.

Absolutely.

Which is why I wrote the above. Although the genius in taking empirical data and coming up with this stuff is amazing.

Kepler, well before Newton, had done this with planetary orbits thus the R^3/T^2 = constant for things that orbit the sun or any satellites orbiting a large mass(though the constant would be diff) And Newton's law of gravitation along with centripetal force confirmed Keplers derivation (or better said, mathematical model that fit the data) from empirical stuff.

Frkn amazing, for me anyways.

[Mark Celibate]

Actually no because you are relegated to easier math problems in Algebra based physics. You can still take slopes and areas as long as they are easy. And Calculus based physics in HS actually has some differential equations, the change of charge in a capacitor, air resistance... It's a bit strange but I have helped kids with both.

I just found it interesting that the conceptual part was more difficult in the algebra based MC, not necessarily the FR.

I know which one you're talking about. tbh I remembered the charged capacitor Diff Eq since I just habitually use the integrating factor method due to it being faster but they use a more difficult approach IMO

In my experience, the changing variables of integration gives students the most trouble since they don't really cover it in Calc II other than u-sub. That, and the nonuniform density stuff

Edit: Just saw that you posted a Dan Fullerton video. He really is the best IMO

[Mark Celibate]

So it now requires algebra 2 or just algebra 1? Because I had algebra 1 pre-ap done in middle school with a 99% grade.

That's a damn shame because I would have rather gotten, say, AP physics (along with AP biology instead of pre-AP biology) out of the way freshman year when I was isolated socially and motivated to work my ass off in school instead of junior year when I hit a real lull and was more interested in doing things with friends and going out with girls. I ended up getting a B+ (88) my first semester of pre-AP physics and dropped down to regular physics for the second semester.

requires Algebra I and should be taken concurrently with Alg II I believe. Maybe you can get away with taking it concurrently with Geometry (Still don't know why they do Alg 1, Geometry, and Alg II in that order...never made sense to me)

[baseline bum]

I know which one you're talking about. tbh I remembered the charged capacitor Diff Eq since I just habitually use the integrating factor method due to it being faster but they use a more difficult approach IMO

In my experience, the changing variables of integration gives students the most trouble since they don't really cover it in Calc II other than u-sub. That, and the nonuniform density stuff

Edit: Just saw that you posted a Dan Fullerton video. He really is the best IMO

I hate memorization so I would never use integrating factors to solve those kind of constant coefficient first order linear equation. You could just shift the origin of the coordinate you were solving for (eg Q --> Q-a for whatever a made your life easier) and it would transform into a geneous equation that you could just integrate and then add back a tbh. Still not as fun as Bernoulli equations when we're talking first order though.

[Mark Celibate]

I hate memorization so I would never use integrating factors to solve those kind of constant coefficient first order linear equation. You could just shift the origin of the coordinate you were solving for (eg Q --> Q-a for whatever a made your life easier) and it would transform into a geneous equation that you could just integrate and then add back a tbh. Still not as fun as Bernoulli equations when we're talking first order though.

yeah that's definitely a much better way. For some reason, the integrating factor is one of those things that I just have down forever in memory like the quadratic formula

[UNT Eagles 2016]

requires Algebra I and should be taken concurrently with Alg II I believe. Maybe you can get away with taking it concurrently with Geometry (Still don't know why they do Alg 1, Geometry, and Alg II in that order...never made sense to me)

agree with you there... also I don't get why they don't just teach geometry as part of pre-cal, there is too much "old" crap from algebra 1 and before that's covered in geometry honestly (like practically the whole first semester goes by doing slope-intercept form, factoring radicals, e.g. stuff you learn in algebra 1 and middle school math without even getting to soh-cah-toa), and too much algebra 2 crap covered in pre-cal. Pre-cal should be geometry, trig, and a little bit on sequences and conics. They really need to skim down and do less teaching twice and 3 times the same stuff in multiple years/courses. Throw out the "geometry" class and teach the important stuff first semester of pre-cal... but they won't.

also... why can't you take algebra II and geometry concurrently? I don't understand that... because you don't really need geometry to ace algebra II or vice versa. Instead of taking some gimmick classes your freshman year of high school, why not take...

- PreAP English I
- PreAP World Geography (that's piss easy)
- PreAP Algebra II
- PreAP Geometry
- Lunch (waste of time, but the school requires it so they can sell their ty food I'd never eat at a high premium... I guess useful to do HW)
- AP Biology (if you're smart enough... Pre-AP was too easy for me IMO)
- PreAP Foreign Language I
- Elective (sports or PE, art, band, etc)

Sop re year...

- PreAP English II
- AP World History (this is another one of those that's irrelevant for college though, they require US but that's about it... don't waste money on this AP test)
- PreAP Pre-Calculus
- PreAP Chemistry
- Lunch
- AP Physics
- PreAP Foreign Language II
- Elective

Junior year...

- AP English III (those timed writings are rough)
- AP US History
- AP Calculus AB
- AP Statistics
- PreAP Foreign Language III (take as Dual Credit if you can)
- Lunch
- AP Chemistry (if your school has it... mine did not sadly)
- Elective

Senior year...

- English IV regular (because English IV AP test nets a practically worthless college credit in British Lit, unrequired for most STEM college majors)
- AP Government/Macroeconomics
- Elective (have you had your fine arts and athletic requirements by now?)
- Elective (health and speech requirement? I don't know if they still require this)
- Elective
- Lunch
- OFF Block
- OFF Block

.... why take "break" periods, like most TX high schools will allow you if you have a job or college? To dink off... nope. Enroll in your local community college instead, and take second-year college courses that will be relevant to your major. If you want to be a business major, take accounting I and II, microeconomics, and business computer IS. If you want to be pre-health, take organic chemistry I and II, microbiology, and anatomy & physiology. If you want to be engineering, take University Physics II, Calculus II, Calculus III and an intro to engineering course. If you want to be computer science, take all those except the intro to computer science course instead of the intro to engineering.

This all sets you up nicely to start your freshman year of college as a JUNIOR, with roughly 60 credit hours (or more) when you first walk into your dorm room. It still allows you to be well rounded in high school and be in sports or whatever you like to do. Imagine that... being only 20 years old and starting your career (or perhaps health professional school)... nice, huh? I wish I had done that. Oh well, I'll do that with my kids when I have kids.