Recent content by lola2000

Similar question but how would this hold true for a situation where you have a random number generator producing numbers between 0 and 9 and you are counting their frequency? So you would have a table of one row and 10 columns. Degrees of freedom is 9?

Thanks so much for the help. I see where I went wrong with the number of restrictions now

I am trying to understand how to decide the number of degrees of freedom when calculating a chi-squared and p value. I have the data: England: people with no pets = 665 people with 1 pet = 976 people with 2+ pets = 913 Scotland people with no pets = 313 people with 1 pet = 527 people...

So if I assume that the second car is the same mass I would get a final velocity of the combined cars after the collision to be 8.575m/s For the energy lost during the collision would I just need to compare the initial kinetic energy of car 1 before impact with the final kinetic energy of the...

Homework Statement A car of mass 1500kg is parked on a 30degree slope before rolling down a distance of 30m onto a flat section where it collides with a stationary car. The cars stick together and scrape along the road for 20m until they come to a rest. Calculate the velocity of the two...

Homework Statement A student measures the the force required topull a box along the floor and then the force required to lift the box onto a table. Which is greater? Homework EquationsThe Attempt at a Solution [/B] Is it the force to lift the box since frictional force is the normal force or...

So it will just be a straight line upwards with a gradient of 1 and y intercept of p+q?

Homework Statement I am not sure how to graph the function f(x)=(x+p)+q Homework EquationsThe Attempt at a Solution When x=0 y=p+q if y=0 x=-q-p ? what shape would this give??[/B]

You are right! That was a typo - it should have been -0.5mv^2 But I am still stuck with the algebra I have 0.525v^2/c^2 = gamma - 1 How do I rearrange this?? It is not simplifying!

I see, that makes sense. But when I do this I get 0.05 = [(gamma-1)mc^2 - 0.5mc^2] / 0.5mv^2 which simplifies to 0.6mv^2 = (gamma-1)mc^2 0.6v^2/c^2 +1 = gamma which is really nasty to solve! Is there a trick I have missed?

sorry what do you mean how to do change velocity*area?

Homework Statement at what speed does the expression for relativistic kinetic energy vary from the non-relativistic expression by 5%? Homework Equations Relativistic kinetic energy K=(gamma-1)mc^2 Non-relativistic kinetic energy K=0.5mv^2 The Attempt at a Solution I'm not...