What is Race: Definition and 225 Discussions

Rače (pronounced [ˈɾaːtʃɛ]) is a settlement in and the administrative centre of the Municipality of Rače–Fram in northeastern Slovenia. It lies under the eastern Pohorje Hills on the edge of the plain on the right bank of the Drava River south of Maribor. The area is part of the traditional region of Styria. The municipality is now included in the Drava Statistical Region.Rače Castle is a 16th-century castle west of the settlement. It was built between 1528 and 1533 and was originally surrounded by a moat. In the 17th century two round towers and a chapel dedicated to Saint John of Nepomuk were added to the building. A square tower on the opposite side of the building dates to 1915.

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  1. C

    The Lake House: Mike and Tina's Race to the Sauna

    Homework Statement The lake house is located in A, which is home of Mike. Against the shore, perpendicular to the 675 m distance is the island's beach house B, which is home of Tina. Mike walks along the beach at a speed of 6.9 km/h toward the sauna and the C arrives there exactly 10 minutes...
  2. J

    Electric Race Car: What Gauge Wire & Fuse/Circuit Breaker?

    I am in the process of building an human sized electric race car, and am wondering what gauge wire would best benefit me. The car will be powered by 5 HR22-12, data sheet attached, batteries in series running at 12 V 20AH each for a total of 60V 20AH. This is an endurance race lasting one...
  3. C

    Average Velocity Race Question

    Homework Statement During a race on an oval track a car travels at an average speed of 200km/h. a) How far did it travel in 45.0mins? b) determine its average velocity at the end of its 3rd lap. Homework Equations ok I worked out part a of the question and that is fine. But logically...
  4. C

    Time Dilation Paradox: Interstellar Race

    Hi, I asked a theoretical question here a month or two ago and someone was able to help me. I have another: Imagine an interstellar race. Starship 1 heads from Earth toward Alpha Centauri at a constant rate close to the speed of light, then makes a loop and returns home. Ship 2 is faster, and...
  5. R

    How many litres of air do I need for a raft in a Daft Raft Race?

    raft for a "Daft Raft Race" Hi all, Now I know this has probably been asked already, and it's probably a very simple question, but I'm building a raft for a "Daft Raft Race" and I was just wondering how many litres of air in cylindrical, metal barrels would i need to support around 600 kgs...
  6. R

    Amature national race team needs some help

    Hey All, we race mini / kids ATVs at a national level. these little things use a CVT style transmission, which is critical for performance, and tuning is a pain. if you are not familiar with a CVT, the fundamentals are a spinning mass on the crank shaft that creates a force on a part...
  7. A

    Human race has come from another universe to earth

    Gravity is an important force in this world. if we presume humans have evolved over millions of years through a process of evolution why all the major and cellular mechanisms not gravity dependent. From our food intake to processes of excretion, blood pumping, breathing and down to cellular...
  8. B

    Fred & Frank Race: Who Finishes First?

    Fred and Frank : Fred and Frank are two fitness fanatics on a run from A to B. Fred runs half the way and walks the other half. Frank runs for half the time and walks for the other half. They both run and walk at the same speeds. Who finishes first? So I solved this. Frank finishes...
  9. T

    Sports question. Team Race to 6 points chances

    Was hoping someone might be able to assist in this problem Scenario is have a American football game with two team A and team B. Am trying to work out the probability of each team getting to 6 points first, from the following infomation: Let A be the event team A scores equal to or more...
  10. D

    Jack and Jill's Race: Solving a Physics Problem

    Homework Statement Jack and Jill ran down the hill, Both started from rest and accelerated steadily. Jack accelerated at .25 m/s/s and Kill at .30 m/s/s. After running for 20 s, Jill fell down. A) How far did Jill get before she fell? 60m B) How far had Jack traveled when Jill fell? 50m...
  11. Q

    Kinematics: the race that Lance could now win

    Homework Equations v=d/t The Attempt at a Solution VL=VR+2km/h d=6km tL1tR+4min tL2=tR +2 VL= 6km / (2-4) = 3km/min which is OBVIOUSLY WRONG. I have tried numerous things for the past couple hours, but can't seem to figure it out/. Help?
  12. H

    What is the minimum average speed needed for a car to qualify in a drag race?

    Homework Statement to qualify for a race a car must achieve an average speed of 254 km/hr on a track 1600 meters long. if a car covers half the track with an average speed of 227.5 km/hr what minimum average speed must it have the second half to qualify? Homework Equations...
  13. S

    Optimizing Race Kinematics: Solving for the Fastest Time

    Hi, I am unable to figure this question. Could someone help please ? A new type of race has been proposed. The object of the race is to complete the course and stop on the finish line in the minimum amount of time. The race is exactly 1 km long. The car can accelerate at 8m/s^2 and decelerate...
  14. T

    Calculate Acceleration for Race Car Driving

    1. If your car goes from 0 mi/h to 40 mi/h in 5 s, what is your average acceleration? Answer in units of miles h · s 2. i think i multiply 40 times the 5 and then the answer by something else. I'm not too sure
  15. Char. Limit

    News Is Racism and the Race Card Still a Relevant Issue in America?

    So, I'm looking around at our Tea Party thread, and I notice that there's a lot of talk about racism. Now, this thread has only a passing connection to that one (inspiration, if you must know). I have a few questions I wanted to ask: 1. Do you believe that pro-white racism is still a relevant...
  16. H

    Race Line in CFD: Finding the Fastest Route for Go-Cart Racing

    Hi I want to model a race track in CFD. This is so I can figure out the best racing line. Is it as simple as finding where the fluid flows fastest, and thus showing the best racing line? I know its a little over the top, but its for a go cart track I race on, and I want to know how to...
  17. TheStatutoryApe

    Music Music to Race To: Suggestions & Playlist Ideas

    Music to Race to... I recently picked myself up a racing game that allows you to import your own playlists of music. Unfortunately I have found that I do not have a very wide selection of music that is very good for racing. I would like suggestions of music that would be good to listen to...
  18. GRB 080319B

    News Is Race War Inevitable? - Watch this Youtube Video to Explore the Topic!

    http://www.youtube.com/watch?v=koLX6-XtAnA"
  19. S

    Why don't race bikes have a high CoG?

    It seems to me that motorbikes are built to have a low centre of gravity. I can understand this, having dropped mine twice. Once it gets away from you, there's no stopping it, and having a low CoG helps to make the bike easier to handle in the garage. However, once you're riding it, then...
  20. P

    Heat-to-Coolant Determination for Race Car

    Happy New Year 2010 everyone, I need your help with the determination of heat rejection to coolant from engine. I need to define this in order to finalise the geometry of a suitable radiator. I have an Excel spreadsheet from my team mate about the results obtained at the lab last year. I...
  21. E

    Unraveling the Chemistry of Race Fuels: A Beginner's Inquiry

    Let me start with a little background. I have a no more of an understanding of chemistry above what was taught to me in high school, and even that was a day or two ago. I spend my free time making horsepower for use in drag racing. In becoming better at what I enjoy doing, I have taken up...
  22. P

    Investigating Crash Dynamics: Lexmark Indy Race Drivers

    Homework Statement What impact does physics facts like momentum, friction, collision, forces, inertia and second collision have on race driver crashes. Particular race: The Lexmark Indy. Particular year: None Homework Equations The Attempt at a Solution I can't seem to find a...
  23. R

    Weightlessness discoveries in the history of the human race

    What are the major weightlessness discoveries in the history of the human race and how will they be of benifit to our future?
  24. S

    Calculating Speed for Banked Racing Track

    Homework Statement Car is driven on a banked circular racing track. Radius R, angle theta. a) For what speed is the track designed (if there were no friction the car would not slide) b) If the track is wet, u=0.15, what are the minimum and maximum speeds car must be driven so it stays on...
  25. A

    Drag race- avg power output

    Homework Statement A top fuel drag racer with a mass of 500.0 kg completes a quarter-mile (402 m) drag race in a time of 4.3 s starting from rest. The car's final speed is 115 m/s. What is the engine's average power output? Neglect friction and air resistance. Homework Equations P = W/T...
  26. Ranger Mike

    Automotive Race car suspension Class

    references _ Paved Track Stock Car Technology by Steve Smith Tune to Win by Carroll Smith Software - Suspension Analyzer by Performance Trends In order to understand the complexity of a Formula Cars suspension, a basic knowledge of the stock car suspension should first be mastered. When...
  27. K

    Kinematic Car Race: Which Car Will Win with and without Friction?

    Homework Statement Two cars start 10 meters up a hill. Car A has a mass of 9 grams and Car B has a mass of 2 grams. Additionally, both cars must travel the same distance to the finish line. a) If friction is ignored which car will win the race? b) If friction is not...
  28. Topher925

    Why is methanol used in race engines?

    The enthalpy of formation of methanol (-22.7 KJ/g) is about half that of octane (-47.8 KJ/g). But methanol allows an ICE engine to achieve much greater specific powers than a comparable gasoline engine. My RC heli runs on methanol and will outperform any gas powered heli. But why is this? I...
  29. Z

    Race cars - Torque vs Hp - The Undiscovered Country (for many)

    We have some unbelievable discussions regarding the acceleration of race cars. At first glance, many just look at what they remember, F=ma and go on long rants regarding engines that have high levels of torque. However, even when you rearrange the term to a=F/m, its still a Force at the...
  30. M

    Calculating Horse Race Energy & Power

    Here's a question I've been thinking about for a long time. I can't figure out the answer. How do you calculate the energy and power expanded by a horse in a given race if you know the horse's weight and the surface on which it runs? Thank you.
  31. C

    Gravity's Race/ Contest Who wins?

    Gravity's Race/ Contest... Who wins? Click on attachment and post your answer:smile: You'll be amazed! Winner Willie or Red Balloon
  32. Ranger Mike

    Race Car Physics: Mastering Tire Contact Patch for Auto Racing Success

    webmaster, pls move this to applicable forum. I have much respect for members on this website and hope I may show the absolute requirement of good working knowledge of Physics..to compete successfully in Auto Racing... Many of you have expressed interest in a subject I have tried to master...
  33. M

    Drag Race Christmas Tree Design

    1. Homework Statement Question Details: A "Christmas Tree lighting system is used to start a drag race. The inputs to the system include a start button, a reset button, and two start line sensors. The outputs include lines for Red, Yellow, and Green lights and two Fault lights. When the...
  34. M

    Drag Race Christmas Tree Design

    Homework Statement Question Details: A "Christmas Tree lighting system is used to start a drag race. The inputs to the system include a start button, a reset button, and two start line sensors. The outputs include lines for Red, Yellow, and Green lights and two Fault lights. When the operator...
  35. R

    Find the acceleration of a race car traveling up a curve

    Homework Statement A 500 kg race car starts at rest on a curve with a radius of 50 m. If it goes 20 degrees in 4 seconds with a constant angular acceleration, what is its total acceleration at the end of this time? m=500kg r = 50 m angle = pi/9 radians time = 4...
  36. Evo

    News Election spurs 'hundreds' of race threats, crimes

    This is so wrong. What is wrong with America? Why is racism still so widespread? The little boy in the article stating Obama should be assisinated is one answer. He's been taught by his parents. Racism is taught, and like other beliefs that are taught and are part of the culture a child...
  37. P

    Drag care race, finding distance and time

    EDIT***: sorry I figured out how to do this problem and don't need help anymore...:\ Disregard and even delete this thread. Homework Statement A race-car driver buys a car (CAR A) that can accelerate at +5.9 m/s2 . The racer decides to race against another driver with a car (CAR B) that...
  38. Eraniamayomii

    Advancing the Human Race Through Space Exploration

    Hello. Let me start by asking your forgiveness for my lack of grammatical skill. I know I need work in this subject. None-the-less, I'd like to ask a couple question concerning my dream. Please keep in mind that college is quite a ways off. I'd like to be prepared now though. Along with my...
  39. P

    Tortoise vs. Hare Race: Length of Race Solved

    Can someone help me with this question? I am not sure where to go with it. A speedy tortoise can run with a velocity of 10 cm/sec and a hare can run 10 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.0 minutes. The tortoise wins by a shell (20 cm)...
  40. S

    Communicating with an alien race

    Not sure if this has been asked here (searched but couldn't find anything), but I thought this was an awesome question (heard in a feynman lecture) If you were communicating with an alien race, with no visual lines of communication (only audio) how would you explain left and right, so that it...
  41. J

    How Much Power Does a 1500-kg Racecar Need to Reach 90 km/h in 5 Seconds?

    Help Please! A 1500-kg racecar can go 0 - 90 km/h in 5.0s. What average power is required to do this?
  42. S

    News Moving Beyond the Race Card: Examining the Role of Race in Politics and Society

    Watching CNN over the past couple of weeks, I have noticed several guests *warning* the audience that the GOP will play the "race card" in an effort to create fear amongst their constituents. These guests offered no evidence of the McCain campaign having done so yet, and cannot point to any...
  43. P

    That's it, I'm breaking off of the human race.

    http://scienceblogs.com/erv/2008/05/hahahahahahahaha_you_guys_omg.php There is an MP3 on that entry, obviously, and you should NOT listen to it, but you will. Very long intro, over a minute and a half long, so you can skip that. Also, some commercials.
  44. S

    Who Will Reach the Bottom First: The Heavier or Lighter Car?

    If two cars were at the top of a uniform slope, and the cars are identical in every way other than their mass, which one would reach the bottom first? and why? This is an argument that lasted all the way from inverness to dundee, and still hasn't been settled, even though there are about 100...
  45. S

    Relativity and my Intergalactic Space Race

    Sorry if this has been asked before, but I tried a search and couldn't find anything... so here goes my question. Suppose I'm going to hold the 1st annual Intergalactic Space Race, but only 2 people show up to compete. One guy is in a SuperPlamasmonic X3000 Racer, capable of a accelerating...
  46. A

    A few points dealing with race

    1) On TV, people are always paired by their supposed race. It is taboo to do otherwise. 1) It appears that the notion of who is white has become more relaxed over the past decades to include almost everyone, with the one-drop rule still applying to those of black descent (TV illustrates this...
  47. S

    Soup Can Race Help: Faster & Slower Cans

    Soup Can Race: Help! Later this week my high school physics class is having the traditional soup can race. However, we have four cans to work with:1 stock can that must be the fastest, one stock can that must be the slowest, 1 modified can that must be the fastest, and one modified slower can...
  48. G

    Average acceleration race horse problem

    Homework Statement Secretariat ran the Kentucky derby with time for the quarter mile of 25.2s, 24s, 23.8s, and 23s. Assuming that secretariat's instantaneous speed at the finish line was the same as the average speed during the final quarter mile, find his average acceleration for the entire...
  49. wolram

    What Is the Ideal Human Population and What Kind of World Is Possible?

    Does the human race------ Have a goal, other than an ever easier lifestyle, do you agree that we will never all be equally comfortable, do you agree that the Earth does not have the resources to make it so? In another thread the ideal population for Earth was guessed to be 2 billion, we are way...
  50. B

    How Fast is the Racecar Moving Based on the Doppler Effect?

    Homework Statement The pitch of the sound from a racecar engine drops the musical interval of a fourth when it passes the spectators. This means the frequency of the sound after passing is 0.75 times what it was before. How fast is the racecar moving? 1. 61 m/s 2. 49 m/s 3. 72...
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