Running Definition and 371 Threads

why are people of African decent good at running long and short distances?

I have a homework problem that I can't figure out, can someone help --Create a function called sums that will prompt the user to enter integer values (either positive or negative). The function should keep separate running totals of the positive values and the negative values. The user should...

Hi! I've never done any programming in fortran and got stuck trying to test run a program. Note that I am not learning how to program in fortran, this is for an astrophysics course. Basically what I need is an instruction how to run a fortran code if I have some .f files and .o files as well...

(sorry for the typo in the title) I have heard both yes and no when it comes to this. But now it's time to ask you guys who probably really can put this to test. Certain factors is probably like the angle of the falling rain relative to your motion, right? And the volume per cubic meter of...

Sarah Palin has announced she's not running for president. http://thecaucus.blogs.nytimes.com/2011/10/05/palin-says-shes-not-running/?hp (Wasn't sure this was appropriate for its own thread, but it didn't seem to fit anywhere else.)

Homework Statement A rabbit runs in a straight line with a velocity of +1.5 m/s for a period of time, rests for 10s, and then runs again along the same line at +0.60 m/s for an unknown amount of time. The rabbit travels a total distance of 1200 m, and its average speed is 0.80 m/s. (a) What is...

Homework Statement A 65 kg student jogs upstairs from the first floor to the sixth, a vertical distance of 17.6 m, in 65 s. Find the power the student expends working against gravity (In kW.) Homework Equations F=m*A W=F*d P=W/t The Attempt at a Solution Tried solving here but...

Many runners twist in their upper body while they run. You can see this by watching the logo on their tee-shirt move sideways. You can also see it when their arms cross in front of their body instead of moving straight forward and back. We have found that runners do this because of tightness...

Homework Statement Show from the given equation V[SIZE="1"]b -V[SIZE="1"]a=-intergral a to b (E x ds) that the electric field lines run from higher voltages to lower voltages. Also show from this equation that the electric field lines are perpendicular to equipotential lines. The voltage in...

Homework Statement A bus goes from the bus stop with the acceleration 0.75 m/s^2. A girl runs after the bus. She has the speed 8.0 m/s, and she was 17.5 m behind the bus as it started. a) How long time does it take the girl to catch up with the bus?Homework Equations THe equations for...

I've been trying this out to distract people less. Yesterday I took it to a treadmill. It was nearly silent compared to the thuds I'm used to hearing with each footstep. At first I found it easiest to achieve this effect by stepping pretty much only with the balls of my feet. Then I found that I...

I want to know if there is any compiler running in the background when I open applications such as MS office or calculator. Also, if there is any compiler running when I save any office documents or open web browser and start browsing. I get this doubt because I believe that all that is...

Recently I was browsing the interwebs, and I got a pop-up that was a simple quiz: all it asked was "Will you vote for Sarah Palin if she runs for president in 2012?". Have there been any rumors about this.

Homework Statement An electric current of 10A runs for 1 minute through a 20 ohm Resistor which is maintained at 10 degC by being immersed in running water. What are the entropy changes in a) the resistor b) the running water c) the universe Homework Equations P = I2R dS = dQ/T...

Homework Statement The man is 3m high from the saddle on a tree limb. The horse is running at 10m/s. A) What is the horizontal distance necessary for the men to land on the horse B) How long is he in the air Homework Equations I used y/accel to get the amount of time for him...

I intend to purchase an Alternating Pressure mattress from US which runs on 120 V, 60 Hz & 1 Amp.The problem is I would be using this in a country which has a 220 V ,50 Hz supply. I understand that if I use a converter it's only going to convert the voltage from 220 V to 120 Volts but will...

Hey, I have been looking at buying the new five finger shoes to run in for my HS cross country team and I'm not sure of the benefits so please comment.

The textbooks say that motors and generators are the same structurally, they just differ in what is input (motion / voltage) and what is output (voltage / motion). I have also read that electric trains use this phenomenon for their 'electric braking', by running their motors as generators by...

Hi, guys. I'm currently debating the value of treadmills on a health forum. It seems to me that once a treadmill is at speed, running on it will be (disregarding windfriction and an inability to turn, ever), basically the same mechanic as running over a flat "ground," with the same relative...

The local electric supply in our country is 415 volts. Our company recently imported plant and machinery. All the motors and electric panels that have been imported are on 220/110 volts specifications. The total load of the motors is 110 Kw. The motors are now tripping as soon as they are...

Hi, When we run, our body temperature increases because as we convert the chemical energy from the food in our muscles into mechanical energy, some of it is lost as heat, increasing the internal energy of the molecules and, hence, the temperature? Is everything I said correct? Thanks...

Homework Statement a 45kg child runs with a speed of 3.50m/s tangential to the rim of a stationary merry-go-round that has a momentum of inertia of 555 kg m^2, and a radius of 2.45m. when the child jumps off, the entire system begins to rotate. what is the angular speed of the system...

I know this isn't really a physics-focused question, but this is still the best science forum that I know of.

hey, can someone please explain what exactly is d c motor running on no-load?

Last year I received my BSc in Electrical Engineering (Control Theory and Electronics Dept.) and enrolled in MSc program at the same institution (hopefully I will receive the MSc degree next summer). Now, I really don't see myself as an engineer, that is why I want to pursue a PhD program in...

can anyone tell me if it is possible to run a asynchronous generator from a capacitor bank and what it may entail.

Very simple C program ( running total) [solved] Homework Statement Question is: Given that two int variables, total and amount , have been declared, write a sequence of statements that: initializes total to 0 reads three values into amount , one at a time. After each value is read...

I have already referred to this posting: http://www.mathworks.com/matlabcentral/newsreader/view_thread/241352 so I know the basics of running an executable from Matlab and inputing a file for it to run. My problem is that because of the way my executable was written, I can only run the...

I.e., what is beneficial about main(int argc,char *argv[])? I see a lot of seemingly good programmers write the main like this, but what does it do that int main() cannot do?

Hi, this is may be trivial but i am confused anyway, i want to ask about the force we exert or calorie we spend on a treadmil is same with outside running. I mean in treadmill the running belt somehow propels us? By the way i neglect the surface effect of the treadmill.

It will be obvious that I am not a certified Electrical Engineer. I am trying to create a small display and using LED lights to "accent" the display. I was wanting to use 6 to 9 LEDs in a circular fashion. What I am not certain of is: Can I run 6 - 9 LED's just by using a power cord and...

Can someone point me to a reference that explains how the (effective) running coupling behaves in the weak interactions(at 1-loop order). I couldn't find it... If I understand correctly, than the coupling is g = \frac{e}{sin(\theta_W)} where e is the QED coupling, which increases with energy...

I am a competitive runner, who spends too much time on the Runner's World forums. From time to time questions arise involving the biomechanics of running, and the runners start debating running for and the effect gravity has on running. Specifically advocates of the POSE Running Method suggest...

Homework Statement A runner runs with a constant speed around the track. 1. At which point is the runner's velocity the largest? Explain. 2. At which point is the runner's acceleration the largest? Explain Homework Equations The Attempt at a Solution It seems to me...

Homework Statement A rabbit starts at the origin and runs at speed a along the right branch of the parabola y = x2. At the same moment, a dog starts at the point (c,0) and runs at speed b directly towards the rabbit. Write a differential equation for the path of the dog. Homework...

Who will get more wet? The one who is slowly walking in the rain or the who is running fast? What is the physics behind it? Thanks in well advance

Any literature on the big bang usually describes the initial moments as hot and dense. The laws of thermodynamics point to a universe where entropy is increasing, so given the assumption the universe is a thermodynamically isolated system, this implies a low entropy big bang. given that minimum...

I train runners to run more efficiently, in part by reducing their vertical oscillation (bounce), but I don't know how to figure out how much work they do during a marathon based on the size of their oscillation and their weight. I also want to be able to tell them how much falling force they...

http://www.bbc.co.uk/news/world-us-canada-10783019 Personally I would have no problems being sent $ coins in large quantities, and I'm not even very bothered about which president was on them.

Hi, I'm a bit new to the forums, this is my first post in fact, but I didn't know where else to go for help on this kind of matter. I'm not sure if anyone here has used ISIS image subtraction program written by Alard, available online at http://www2.iap.fr/users/alard/package.html, but I'm...

I know there are at least 2 other threads on the science behind this, but is anyone here a dedicated barefoot runner? I run about 50 miles a week right now, and today I went for my first barefoot run. I ran a 30 minute route that took me on grass, concrete and 1 mile around a track. As...

Dear all, would anybody know of references regarding experimental constraints on the running of the weak coupling ? This running is rather slow, and I guess we do not have evidence one way or the other, but since the SM and the MSSM have opposite slopes, I'd like to see what kind of...

Hello to all I downloaded Octave. I read that it will run MATLAB programs, but how do you do that? Thanks

Folks, I do Logic design and verification of Multi-core chips for a living (4th year in Semiconductor/Computer HW industry). I don't have much of a background in Physics outside my high school and some Applied Physics courses that I took in BS-EE and MS-EE. I don't covet a PhD in Physics, all I...

Dear all, I have no science back ground , I have purchased a 30KVA gas generator, for my farm house, I would like to know if I run it well below its capacity will it be harm full for the generator or it will get hot. It’s a American generator with cooling tower design, which I have converted...

Assume you're running on a treadmill, looking down at your feet. what would describe this kind of motion? thanks

Okay, so I was running the other day and thinking about friction as I hit a patch of gravel. I'm a new physics student so I know enough to think about some things but not enough to know the answers yet. Why is it that if friction works to slow down my velocity, then when there is less friction...

Does the absence of drag while running on a treadmill make it a significantly less taxing exercise than running outdoors?

I don't know fortran. I have to run few files from clawpack and I have to get results. I have windows xp 2002. Can anyone tell me what software/fortran compiler should I install ? and how do I get results? Thanks in advance

Hi I intend to use a interactive program I have written in mathematica in a presentation. But it has become apparent that I may not have internet access when giving this talk, my license only allows me to open mathematica when I am connected to the web. Is there any programs that will allow...