Ap Definition and 669 Threads

2008 AP Physics B Free Response MISTAKE? Homework Statement Question number two can be found here... http://apcentral.collegeboard.com/apc/public/repository/ap08_physics_b_frq.pdf Homework Equations The Attempt at a Solution Ok I was working out question number two and was...

These were the only questions out of the 110 question study guide that I didn't understand, I have no clue how to do them since it's been a while since I've done stuff from early chapters. I would love it if anyone can help me and give me a step-by-step! Thank you in advance! Fe2O3 + 3CO -->...

A standing wave pattern is created on a guitar string as a person tunes the guitar by changing the tension in the string. Which of the following properties of the waves on the string will change as a result of adjusting only the tension in the string? 1) Speed of the traveling wave that...

Homework Statement well this is just a over all question. I am currently taking the AP b and recently i did this lab on collision. there were 3 collisions, a) one stationary while another one hits it b) both masses crash into each other c) both has velocity but one has higher velocity to...

I am a junior in high school. This year I am in the advanced trig/pre-calc course. Next year seniors who still want to participate in an advanced math course can choose to enroll in AP Calculus AB,BC. This is the normal order math classes are taken. Now I wanted to take calculus courses at a...

I need some recommendations for the *best* ap guide. I know princeton review is very popular, but some say is very simplistic and only covers basic materials. I also heard Barron's is pretty good at covering the material in depth. I really don't know much about McGraw Hill's 5 steps to a 5. I ap...

1. The 1.0-m-long nonuniform plank has weight 1000 N. It is supported by two rods, A and B, as shown above. The center of mass of the plank is 30 cm from the right edge. Each support bears half the weight of the plank. If support B is 10 cm from the right-hand edge, how far from the left-hand...

After excelling at honors physics 1 at my high school my 10th grade year i was recommended for the AP physics class which was just introduced to school aimed at seniors. I love science, mathematics and how the world and things work which is why i signed on, however the class is very demanding...

Hello guys. I remember some basic projectiles problems from Honors Physics last year, but I have a feeling they don't involve some of the same complicated concepts of projectiles problems that appear on the AP exam. This Friday my teacher is going to give the class a single question from I...

Homework Statement Assume you are driving at the speed limit Vo. As you approach an intersection 22m wide, you see the light turn yellow. During your reaction time of .6s, you travel at a constant speed as you recognize the warning, decide whether to stop or to go through the intersection...

Homework Statement two 10-kilogram boxes are connected by a massless string that passes over a massless frictionless pulley. The boxes remain at rest with the one on the right hanging vertically and the one on the left 2.0 meters from the bottom of an inclined plane that makes an angle of 60°...

Homework Statement 1) Given f(x)= .01x³ + .7x -2 . Approximate ƒ−1(3). 2)Given f(x) = (x³) / (x²+1) and g(x) = ƒ–1(x). Evaluate g'(2) The Attempt at a Solution 1) Would this be correct? 3=.01x^3 + .7x -2 But then, how would I find x at 3? 2) I am confused about going...

So basically when I took Biology G/T Freshman year of High School, I never listened in class or did the homework since my life was absorbed by video games (ending with a C average in class, almost a D). Now, as a senior, I am taking Biology AP however I really want to turn over a new leaf (and...

1. A uniform solid sphere of radius r starts from rest at a height h and rolls without slipping along the loop-the-loop track of radius R as shown. a) What is the smallest value of h for which the sphere will not leave the track at the top of the loop? Attempt: Homework Equations...

A worker pushed a 27 kg block 7.8 m along a level floor at constant speed with a force directed 33° below the horizontal. (a) If the coefficient of kinetic friction is 0.20, how much work was done by the worker's force? (b) How much energy was dissipated by the frictional force? please i really...

I'm currently a high school senior. I self-studied for AP Chemistry (using Zumdahl) in 10th grade and would like to continue studying chemistry this year. My question is: what textbook should I use? In AP Physics last year, teacher simply gave us a whole bunch of formulas to memorize. I went...

Hello all! This year i have signed up for Physics B AP, it is an algebra based physics class that deals with E&M. I have been very inspired by this class, it is very interesting and intriguing, but i am horrible at the subject. I average 40% on tests/quizzes, when the class averages around...

I am self-studying ap calculus bc. I need someone to recommand me a good prep book. I will also get a tutor. If possible also give me a link with good worksheets and solutions. please give me the link of the picture of the prep book you recommand I hear PR and Barron are pretty bad.

As you all have seen, I am completely lost, but within the last two hours of being a member, I now know how to add and subtract vectors. Anyway! I made the image, because there is a diagram, and I have some clue as in what to do. My head is still spinning from the 40 vector addition/subtraction...

I'm currently a senior in HS, and I've gotten a 5 on the Physics B AP exam and hope to get a 5 on the Physics C AP exam (mech and electro). I asked my teacher what I should do (I'm going to University of Texas at Austin; ME major) about the credits. Some posters here at this forum have...

Can someone please list and if possible explain some positive and negative effects of genetic modified crops?

Homework Statement First, this is not an assignment, per se, it is for my own help, and If someone could help me work it through that would be much appreciated. An object of mass 1 Kg is launched at an angle of 42° from the horizontal at 180 m/s. A force of drag acts on it that is dependant...

Where can I find some old (2000 - 2008 ) AP Physics C Mechanics exams, preferably with solutions? I'm looking for both multiple choice and free response. Any help would be much appreciated, Robert

Homework Statement A 2-kilogram block slides down a 30 degree incline as shown above with an acceleration of 2 meters per second squared. The magnitude of the frictional force along the plane in most nearly: Then some multiple choice answers. Homework Equations F=ma The Attempt at...

Alright so I just wrote an AP physics test and one of the true or false questions was: A horse pulls a cart and the cart pulls back on the horse with the same force. Does the cart move? (the cart starts at rest) I said false because in order for an object to move it needs a net force but...

Homework Statement If y = f(u) and u = g(x), where f and g possesses third derivatives, find a formula for similar to the one below: Homework Equations The Attempt at a Solution Ok, so I am basically completely lost on this one... because I came up with a solution for...

In a heat engine is the net work negative or positive? Also, What about a refrigerator?

Homework Statement A block of mass m hangs on the end of a cord and is connected to a block of mass M by a pulley arrangement. (m hangs freely, M is attached to the string, and is on a table top. (So m is attached to a string which goes therough a pulley changing the strings direction 90...

Homework Statement Let f be the function given by f(x)= (x-1)(x²-4)/ (x²-a). For What Positive Values of a is f continuous for all real numbers x? Homework Equations The Attempt at a Solution What I tried doing was separating the (x²-4) into (x+2)(x-2) then moving along from...

we are only doing mechanics the whole year, and my teacher sucks. He doesn't teach us, I have the book University Physics 9th Edition. The book is literally horrible. we started class a week ago and I'm trying so hard with no results. We are on vectors which I find very complicated. How can I...

I am a junior in high school with a 4.1 GPA. I am seriously considering either paleontology or some kind of biology as a major in college. I have read that as a future science major, I should take as many science courses as possible in high school. I know I will need to use chemistry in...

I know this is somewhat of a trivial thing, but... I've been stuck on deciding whether or not to drop my AP English class. I'm a junior in high school. My GPA is 3.75 overall or 3.70 academic/Calgrant. I'm not exactly sure of my major, but I'm planning on Engineering, if not, something in the...

Hi everybody, I had 2 HW questions that I didn't get for my physics class, and I would really appreciated if you could explain them to me. They're pretty simple, I think, but the way they're worded makes it difficult to picture. 1) Two trains, each having a speed of 30 km/hr, are headed...

Currently I am enrolled in a regular physics class because their was only one AP Physics B class period and it affected my Latin II course. So I took Physics at a votech where I am also taking an engineering class. My question to all you physics pros is do you think I could self study and...

Homework Statement A soccer player kicks a ball at an angle of 42 degrees to the horizontal. The ball leaves his foot with a velocity of 18m/s. The player that receives this ball is standing 46m from the kicker. How fast does the reciever need to receive the ball befor eit hit's the ground...

I just discovered that this year I am going to be teaching AP Physics C (the one with calculus) - just the mechanics curriculum. And the school does NOT have any textbooks for the students yet. So I was just asked to make a textbook recommendation. In the past I have taught AP Physics B...

Hi! I believe that I have asked a question to this similar before but I was unable to find it. I am going into my senior year of high school and I have the choice to take AP Physics B or C. I am currently signed up to take AP C, but I have been wondering lately if that's the best choice since...

Hello everyone, I got my AP scores today and I won't go into any detail but I passed none of them. Does anyone believe that I should still put my scores on my application?

Hello all, I'm a high school student in transition from junior year to senior year. And I was wondering if anyone thinks that it would be a good idead to take AP Physics as opposed to AP Psychology? When I go to college I plan to major in a science, but I'm not sure which course will make...

I hope I posted this in the right place... Anyways, I have just about finished my junior year of high school, and I have been looking forward to taking another physics course in my senior year. Because the sequence of science textbooks continues with this...

I got an 85 on my AP Bio Final! Wohoo

Sorry I didn't know where else to post this. But I thought that test was way harder than any of the practice tests I've taken. The free response, at least.

I have no idea how to do the balanced equations portion of the FR. I know how to balance equations using stoichiometric coefficients, but not the particular type of "balanced equations" on the AP test. For example: "a small piece of sodium is placed in distilled water" my initial thinking...

I'm finding a lot of inconsistency with the solubility rules from different sources. especially when it comes to SO4(negative 2 charge). my teacher told me: soluble except when combined with Ca2+, Ba2+, Sr2+, Pb2+... however, other sources sometimes include Hg(II) 2+, and some Ag+, and...

Homework Statement Block A of mass 2M hangs from a cord that passes over a pulley and is connected to block B of mass 3M that is free to move on a frictionless horizontal surface. The pulley is a disk with frictionless bearings, having a radius R and moment of inertia 3MR^2. Block C if mass...

Find the slope of the line containing the point (4,0) and tangent to the graph of y=e^(-x) : I found the derivative (-e^(-x)) and substituted x=4. I got an answer of -0.018 but the answer is -0.050.. what did i do wrong?If...

1. http://sites.google.com/site/startngovr/ 2. \SigmaF = \Sigmam*a F_{k}=\mu*N X_{f} = 1/2 at^{2} V_{f} = at For problem 1 we think the answers are as followed: \mu_{s} does not = 0.2 a = 5.32m/s^{2} For problem 2 we have no idea what to do. We have too many...

Hey, I just joined the forum since I have a few troubles studying for the AP Physics B exam. My school teaches only Physics I, which hardly goes into any detail of the topics covered in AP Phys B exam. To make it worse, they hardly touch fluid/thermodynamics and not much detail into...

Homework Statement 1. Let f be a function defined on the closed interval -3<= x <= 4 with f(0)=3. The graph of f's, the derivative of f, consists of one line segment and a semicircle. (a). On what intervals is f increasing ? (b). Find the x-coordinate of each point of inflection of the...

We genetically modified E. Coli with jellyfish genes for flourescence. It was probably the coolest lab we've done yet. No freakin' titrations or counting and sexing any damn fruit flies.