Recent content by pry_or

Alright, this is the answer after all. Even though there is not a single reference to this in the book! Thanks very much for your help!

It's been about 2.5 years since I did real standard deviation or variance calculations. The two formulas given in the text are both about uncertainties from other variables. One is for addition of uncertainties and one is for products of uncertainties. And in previous assignments, all the...

Yeah, I know the definitions. They are given to me. I can usually apply the formulas, but I am not sure how to do it for this question. After some thinking, I believe I could write the formula a = Δv/Δt, since I can calculate σ_{Δv} and σ_{Δt} using basic addition. So σ_{Δv} = σ_{v_{12}} +...

Homework Statement You have determined the acceleration a_{i} of an object in free fall for i = 1 to n different time intervals. What is the algebraic expression for the uncertainty σ_{a,avg} in a_{avg}? (Use any variable or symbol stated above as necessary.) The answer box is formatted as...

Oh yes, that makes sense. I was thinking that distance * normal vector would not give the proper distance, but I couldn't figure out why. So is my method correct or incorrect? And one last general question...is it correct to have a negative scalar projection, or should it be given as...

Homework Statement Find the equation of the plane parallel to 2x - y + 2z = 4 if the point P = (3,2,-1) is equidistant from both planes. Homework Equations a(x-x0) + b(y-y0) + c(z-z0) = 0 The Attempt at a Solution I found the normal vector to the given plane first, as this is quite easy...

That's what I expected, thank you!

That is the exact wording of the problem. That's why I said the wording was odd.

Homework Statement A container of constant volume contains a quantity of gas under pressure. At t=0, the pressure is 4 psi and the temperature is 15°C per minute. What is the rate of change of the pressure inside the container at time t=0? Homework Equations \frac{P}{T} = constant The...