What is Track: Definition and 348 Discussions

Three High Schools—Washington, Lincoln and Roosevelt— competed in a track meet. Each school entered one man, and one only, in each event. Susan, a student at Lincoln High, sat in the bleachers to cheer her boyfriend, the school's shot-put champion. When Susan returned home later in the day, her...

Can anyone get me on the right track? A solution contains the folllowing ions, each at a 0.1 M concentration. Ag+(aq), Ca2+(aq), Ni2+(aq) write out a procedure by which these ions may be sparated form each other and from the solution, clearly indicating the order of separation and...

Homework Statement th rocket driven sled sonic wind no. 2 used for investigating the physiological effects of large accelerations, runs on a straight, level track 1070m long. Starting from rest. it can reach a speed of 224m/s in 0.900s compute for its acceleration assuming that it is constant...

I have two questions that I want to make sure I'm doing correctly and understanding. The first question is how close will two protons get to each other if they are traveling at a velocity v towards each other. I figured you can set up 1/2mv^2 = kq1q2/r and solve for r..is that correct...

Hi guys, I've just completed my first year at Florida Tech with a 3.78 GPA (and completed Physics 1 and 2, and Chem 1 and 2, as well as up to Calc 3 - all with A's except Chem 1 which was a B. I also took a technical writing course and got an A). I also switched from an Astrophysics major to...

OK, is any timetable for withdrawal "artificial" if it is not dreamed up by Rove and Cheney? Is any timetable "artificial" if it does not fit the needs of the oil companies? Next, Bush is a "Washington politician" who has fired and/or ruined the careers of any senior military officers who...

a roller coster car of mass 1500 kg starts at a distance of H=23m above the bottom of the loop 15 m in diameter. if friction is negligible, what is the downward force of the rails on the can when it is upside down at the top of the loop? so what i was thinking is this: f=ma and in this...

:cry: Alright I need help drawing the diagram... I know what I'm doing and a lot of the information but I need help with the diagram. A three car race track has sensors in each lane at the finish line. As the cars cross the finish line their respective sensors respond and send a signal to a...

Can someone help with this? Thnx A toy train track is mounted on a large wheel that is free to turn with negligible friction about a vertical axis as shown in the figure above. The mass of the wheel plus track is 3.59 kg and the radius is 1.79 m. Ignore the mass of the spokes and hub. A toy...

Two blocks are free to slide along a frictionless wooden track. A block of mass m1=5 kg is released from point A. Protruding from its front end is the north pole of a strong magnet, repelling the north pole of an identical magnet embedded in the back end of the block of mass m2=10 kg, initially...

A bobsled run leads down a hill as sketched in the figure above. Between points A and D, friction is negligible. Between points D and E at the end of the run, the coefficient of kinetic friction is µk = 0.4. The mass of the bobsled with drivers is 210 kg and it starts from rest at point A. I...

I'm about to start my third year of an MPhys degree at Oxford. I'm a very serious student and am predicted to get a good first, but I've recently become more interested in becoming a doctor (and possibly doing medical research) than just pursuing a purely scientific career in physics. I'm...

A train is moving west at 50 km/hr. In relationship to the tracks, the top point of the trains wheel is also moving east. However, the bottom point of the wheel is moving west. Assuming the wheel rotates at a constant speed, does the train really move at all?

I know that as inexperienced as I am with this subject as well as higher math, I shouldn't be challenging those that are more experienced than me. However, just going by instinct, doesn't anyone else feel like I do that all of this multi-dimensional stuff, strings, p-branes, supersymmetry...

http://img47.imageshack.us/img47/4519/geo23mo.jpg It's an equliteral triangle I'm suppose to find the area of the shaded region. first of all are the chords of each those regions half 5cm? Should I find the areas of the sectors and then subtract the areas of the triangles? Please...

Hey. Heres the question i was given: I am studying year 11 physics, and this is one of the harder questions I've had to face so far. I am going to explain my theory of what's happening as i go along. If Any of my theory is incorrect, PLEASE correct me on it. I am not only doing this to get...

How do you display a trace bar which shows how much of the swf has loaded ? Thank you

A 0.50 kg glider on an air track is pulled along frictionlessly by a tensile force arising from a hanging 19.0 N weight. Over what distance will it travel in order that 14.0 J of work be done on it? I've been set this question by one of my Physics teachers and it's got me a little...

A small solid marble of mass m and radius r will roll without slipping along A loop-the-loop track, if it was released from rest somewhere on the straight section of track from what initial height h above the bottom of the track must the marble be released so that it is on the verge of leaving...

Two masses m1=100g and m2=200g slide freely in a horizontal frictionless track and are connected by a spring whose force constant is k=.5N/m. FInd the frequency of oscillatory motion for this system. I don't really know how to go about this problem. I'm assuming that the equation to find...

Max spped for a car to go around a curve track without skidding...confusing! here's my question, a car of mass 1000kg moves along the corner of a level road having a radius of curvature 35.0m. If the frictional force between the tyres and the road is 4kN, the maximum speed of the car without...

I've been trying to track down one of the popular physics books, a title I read years ago and can't recall. The author referred to a hypothetical astronaut, traveling at or close to lightspeed. Looking out of his ship's rear window he observes the stars behind him gradually reddening and dimming...

looks like a fun problem, just got to understand it: A 500g block slides down a radial track with height of 1.0 m, it's radius is 1.0 m, with velocity of 4 m/s at the end of the track. what is the loss of the TME? Disipation of energy problem: TMEf - TMEo F * D = K.E.f + P.E.f - (K.E.o...

A 2.12 kg mass on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is 4.83 N/m. The mass is displaced 3.12 m to the right from its equilibrium position and then released, which initiates simple harmonic motion. What is the force (including...

I'm getting back into the whole fitness thing, so I need to know how I should track my progress. Weight, reps, and sets are a good start, and each of them can be directly graphed against the date. One problem is that graphing all of them together might give a false impression of how well...

A solid marble of mass m=35 and radius r=7 cm will roll without slipping along the loop-the-loop track if it is released from rest somewhere on the straight section of the track. From what minimum height h above the bottom of the track must the marble be released to ensure that it doesn't leave...

does anyone of you know a way to track phone numbers?

Any help will be aprreciated... 1. A car traveling on a flat circular track accelerates uniformly from rest with a tangential acceleration of 1.70 m/s2. The car makes it one quarter of the way around the circle before skidding off the track. Determine the coefficient of static friction...

A car in a roller coaster moves along a track that consists of a sequence of ups and downs. Let the x-axis be parallel to the ground and the positive y-axis point upward. In the time interval from t=0 to t=4 s, the trajectory of the car along a certain section of the track is given by (look...

y can't i see currecntly active users ? tnx

An object moves clockwise with decreasing speed around an oval track. THe velocity vectors are in the top right side of the oval labeled G and H respectively. They lie fairly close to one another. I have a few questions: IF point H were chosen to lie closer to point G, describe how the change...

Im Having problems with 2D- curved track velocities. The question is...Find an Equation to find the velocity final of a car with mass - m going down a curved track with a coefficient of Friction - Uk The track is height - h above the ground and has an initial Velocity of Vi...so basically...

I am having some problems with equations for a problem. The problem isn't really a question, it's more of finding equations to make something work. Basically, It is a graph on Microsoft Excel, that resembles a 2D track. The track has variable points that you can change, to increase height...

A jogger runs around a 2 km circular track as shown below. Using graph paper, draw a displacement - time graph of the continuous North vector which runs from the start axis to the jogger's current position. Identify the shape of your graph. Draw a corresponding distance - time graph for the...

No one in my class got any farther than I did on the track problem, and i am afraid when Ehild gave me some help it went just a bit over my head in terms of how to set up the differential equation that i am going to be differentiating... i am going to attach the problem again, because my...

Ok here is the track problem again except this time drawn out with some of my work... this is using Newtons second law... i used microsoft word to draw the track and spring so its a little ruff but you get the idea... still could use some help no matter which way i do it i end up getting one...

I used to run track and had a teammate that ran virtually identical times to me in everything we did. He was a bigger guy (5'11" 180lbs. vs. 5'8" 145lbs.) and much stronger than me in the weight room. I've always been curious about something and am not sure how the physics behind it works...

[SOLVED] Cars Versus Horse on Dirt Track Ok, A little off topic, but something my co-workers and I have been arguing about. They believe if i were to race against horses on an equestrian track in my 240 horsepower 3000lb car, the horses would beat me. With their very un-educated...

Step 0) 22 + 42 + 62+...+(2n)2 = 2n(n+1)(2n+1)/3 Step 1) Let n = 2 22 + 42 = 4 + 16 = 20 2(2)(2+1)(2(2)+1)/3 = 60/3 = 20 Step2) Assume that the formula works for n=1,2,3,...,k ie. 22 + 42 + 62+...+(2n)2 = 2k(k+1)(2k+1)/3 Step 3) 2n(n+1)(2n+1)/3 + (k+1)2 ?

1.Given the joint probability distribution of Y1 and Y2: f(y1,y2)= (2/5)*(2y1+3y2), 0 0, elsewhere find a) f(y1) and f(y2) the marginal distributions b) Given: E(y1y2) = 1/3 E(y1)=17/30, E(y2)=3/5 then Cov(y1,y2)=? c) If E(y1^2) = 7/18 and E(y2^2) = 4/9 and E(y1)=17/30...

Hi, I just needed help starting off this problem: "A 1-km racetrack is to be built with two straight sides and semicricles at the ends. Find the dimensions of the track that encloses the maximum area." There was a similar question which I did before this which involved a Norman...

Proof for that Einsteins singularity theory was wrong: If the universe from the beginning was a singularity, it did not only spread over space instantly, but also kept the same temperature doing this, cause it's said we might observe big bang one day, and thereby it happened there at the same...

I have read that that 'spot size' for reading a track on a CD is twice the wavelength, e.g. on a CD the track separation is 15 microns which can be read by a 700nm laser. But where does this physical rule come from? Also, the DVD standard uses a 640nm laser. That would imply a track...

Years ago I read in the daily paper(!) an account of a new theorem in partition theory. The key was that the guy had had the idea of proving theorems that were not for all cases but for all but a finite number of cases. The theorem had something about the number of ways to partion (prime?)...

A car traveling on a flat circular track accelerates uniformly from rest with a tangential acceleration of 1.7m/s^2. The car makes it one quarter of a way around the circle before it skids off the track, Determine the coeficient of static friction between the car and track? I really have no...

A small solid marble of mass m and radius r will roll without slipping along the loop-the-loop track shown in Fig. 12-34 if it is released from rest somewhere on the straight section of track. For the following answers use m for the mass, r for the radius of the marble, R for the radius of the...

which soundtracks do you like? i like the sound track of pirates of the caribbean. the composer of the soundtrack is klaus badelt. great music...

OK, so the man or woman you're falling in love with tells you to play just one track that you love, a piece of music that says a lot about you, who you are, who you want to be. You're also aware you want to put yourself across in a good light, so although you might love Kalahari Nose Flute Music...