Recent content by laminar

Yeah I get how to find t, but I still don't get how to find the limiting concentration.

Ah, much thanks. Forgive me, I'm an arts student taking math courses.

Yes, I know that I would find the time by x=x0e^kt.

But then another part of the question asks the time it takes to reach half of the limiting concentration... I'm lost.

Rate of change is zero... So, x=a/b when the limiting concentration is reached. What do I do with this? Thank you for replying so fast

This is biological application question, so the limit can't be negative infinity, which is what I would use as my answer for a regular question. The rate at which substance is eliminated from the body is proportional to the amount of substance present, and satisfies the differentail equation...

I have to calculate the phase constant for a mass and spring system for simple harmonic motion. If I find that phi equals the arctan of some negative over another negative number, do I have to add pi to the answer for it to be in quadrant III? I know this is more of a precalculus question but...

I found out that I was converting the cm^3 to m^3 wrong. I calculated the height of the mercury in the tube to be 4.1, and it is wrong according to MasteringPhysics.

A Venturi device has a diameter of 4mm at one end and a diameter of 2cm at the other. Air enters at 1200cm^3/m. Mercury is in the botom of the device. Assuming mercury's density to be 13700kg/m^3, and air's density to be 1.2kg/m^3, find how high the mercury rises. Assume air to be an ideal...

There is a pipe whose diameter narrows smoothly from 10cm to 5.0cm. The pressure at where this pipe's diameter is 5cm is 50kPa. Given water's density of 1000kg/m^3, and a flow rate of 5.0L/s, what is the pressure at the point where the pipe's diameter is 10cm? First the continuity equation...

This is urgent Does anyone here have Stewart's Calculus Fifth Edition? I need to answer a question out of this particular book for an assgienment tomorrow. It is #40 on Page 178, in the chapter review. Could anyone post this question please? I have lost my textbook, all $124 of it but will try...

U stands for mu_k in this post u is the friction coefficient. The force of friction is found by multiplying u, which has no units, by mg. F=umg Then solve for u. If you know u you can find the force required to move an object across the surface. F=uma

Momentum=Impulse mv=Ft

Anyone? This is why I hate web-based grading systems. You never know if you're way off or if it is an error of one or two.

A building is 15.0m tall. By what percent is the air pressure at the floor greater than the air pressure at the ceiling? The floor is at sea level. -- I don't understand what this percentage relates to, and I got 0.17% greater. A U-shaped tube, open to the air on both ends, contains mercury...