Recent content by dlp248

Here is my attempt at a sketch:

I am not sure how to add a sketch to this post; It is a rectangle with two semicircle ends. This is the rest of my work: P= 2πr + 2h 5280 = 2πr + 2h h = 2640 - πr A(r) = πr^2 + 2rh A(r) = πr^2 + 2r(2640 - πr) A(r) = πr^2 + 5280r - 2πr^2 A(r) = 5280r - πr^2 A'(r) = 5280 - 2πr 0 = 5280 - 2πr...

Homework Statement Maximize the area (in feet) of the rectangular field inside of a mile long racetrack. Homework Equations Circumference of a circle = 2πr P= 2x + 2y The Attempt at a Solution Area of the semicircles = πr^2 Area of the rectangle = 2rh A(r) = πr^2 +2rh P= 2πr + 2h + 4r...

Thanks for getting back to me! I was entering this function into a computer for grading. I ended up contacting my professor and she was able to point out to me that the question was asking for a step by step differentiation of the position function. So the velocity function that I found ended...

Homework Statement The motion of a spring that is subject to a frictional force or a damping force (such as a shock absorber in a car) is often modeled by the product of an exponential function and a sine or cosine function. Suppose the equation of motion of a point on such a spring is s(t) =...

Homework Statement When would Ohm's law not be valid. Does Ohm's law only work with specific resistors, i.e. when R = 25 ohms? As the current flows and the resistor heats up does resistance change? Homework Equations V = IR The Attempt at a Solution I would say that no, Ohm's law is not...

Thanks guys. I guess when I saw the number I questioned myself. It'll come with more practice. That is the exact why reason I am loving physics! I'm in the base introductory course at my college this semester so I can get my calc done and then off to bigger and better things! Planning on...

Homework Statement The deepest part of the ocean is about 10,900 meters deep. Calculate the pressure at that depth in units of N/m^2. Mass density for seawater is 1030 kg/m^3. Then convert the pressure to the number of atmospheres given one atmosphere is 1.013x10^5 N/m^2. Homework Equations...