Recent content by Fifty

I see what I did wrong; I didn't differentiate correctly. I got it now, thanks :D

Nope. I was literally just introduced to calculus four weeks ago. EDIT: It's late here, I'm going to have a look at this thread tomorrow (and the comments already posted).

Given a function f(x), I'm wondering if the slope of the secant between points a, f(a) and b, f(b) is equal to the average of the derivative at a and b. Mathematically, I want to know whether: \frac{f(a) - f(b)}{a - b} = \frac{f'(a) + f'(b)}{2} is true. I can see that it is for...

"The printed area of a book will be 81 cm2. The margins at the top and bottom of the page will each be 3 cm deep. The margins at the sides of the page will each be 2 cm wide. What page dimensions will minimize the amount of paper?" (Calculus and Vectors, Peter Crippin et al., 158). [I added...

I'm new to Java. My high school CS teacher requires an MLA-style comment block before the first package declaration in our programs, I was just wondering how I might change the default opening comment block. I'm using NetBeans 7.4. I did some searching and I couldn't find much help. I mean I...

Hmm, this actually makes sense. I remember something in early general science courses about muscles expanding and contracting to move. Not just through the length of a joint, but laterally as well.

So then the question "why do we get tired" is the question I should be asking... I'm getting the idea that the answer isn't physics related. Do you know the answer? Perhaps my biology teacher could answer tomorrow :P

When I first learned the Work-Energy Theorem, I was a little confused. After all, it implied that no work was done when you push against a wall that doesn't move, but I know that I still feel tired after pushing against a wall. So, suppose you have an electro-hydraulic piston bolted to the...

I haven't learned any calculus yet. But won't the acceleration change as pressure is released? Initially, the air will push with maximum force, but as the volume increases, won't the pressure the air exerts decrease and thus the force the air exerts? This means I can't use linear equations...

I need to make a cannon that fires a marble. It must be accurate and adjustable enough to hit targets of varying distance and through varying obstacles. For propellant, I want to use compressed air, for which I have an apparatus (valve from a bike tire attached to a PVC cylinder roughly fifteen...

Starting a math/science club is a great idea! I did/am doing the same at my school. As for jobs: I have worked at a grocery store since I started high school. I literally started both at the same time. I know the manager well and he gives me flexible hours. I work anywhere from 10-25 hours a...

Homework Statement There is a box pulled up a ramp at an angle, θ via a pulley system with a mass m1 at the end, accelerating downward under the influence of gravity and tension in the rope connected to the box. The goal is to find the coefficient of kinetic friction between the leather bottom...

Well, I suppose I couldn't reduce volume and I understand why we do this, mathematically, but isn't only a certain percentage of the mixture water vapour, and thus exerts the same amount of pressure.

Yeah, that was a typo. How do I correct this approach then?

Homework Statement Oxgyen gas generated in the thermal decomposition of potassium chlorate is collected over water. At 24 C and an atmospheric pressure of 762 mm Hg ((101.6 kPa), the volume of gas collected is 0.128 L. The vapor pressure of water is 22.4 torr (2.98 kPa). What mass of oxygen is...