Recent content by ace123

From what I remember of organic nomenclature the parent must always contain the double or triple. You cannot put as a side-chain. As for alkyl groups you just list them alphabetically.

Individual hydrogen bonds may be relatively weak but a larger number of such bonds is anything but weak. Have you ever seen two pieces of glass be stuck together because of water between the pieces. It is virtually impossible to lift one glass from the other without shattering the glass.

Dipole-Dipole moments and hydrogen bonding is a form of intermolecular force. Bond strength is between 2 atoms in a chemical bond. There is no way they can be used as synonyms.

There is a formula for finding the force of friction. It's the coefficient of friction multiplied by the normal force. If you can find the normal force then I don't see your problem.

Maybe the stopping distance can be determined from your diagram. Try to upload it or take a closer look yourself.

A negative number doesn't always mean your are wrong. Think about it. You made the up direction positive right? So the down direction is negative. Your displacement is from the helicopter to the bottom of the rope.

That's what I wrote hopefully it's enough. Thanks

I have a final question I thought harmonic motion is when the force is directly proportional to the negative of the displacement but that is not what i got my force to. Meaning I don't have a negative sign. This would still be a simple harmonic motion though because only the restoring force has...

Well first you substituted the wrong thing. Your problem is \sqrt[3]{cot x} . Yet your subsitution was cot^3(x). Care to explain that. Which is your actual problem. Also I think their is an easier substitution. Clarify your problem.

I think you simplified wrong. It's a multipication sign not addition. See what I mean?

That's great I'll probably do both and see what i get. Thanks for everything

I think I almost got it. What do i have to do after i find the gravitational force at a distance r? You said integrate -R to R and that will give me the sum of the force correct? Isn't there more i have to do to show it's a simple harmonic motion? Or will the final result be that the force is...

Okay just wanted to make sure that it wasn't the same as for a hollow sphere. The volume is (4\/Phi/3)r^3. So the mass over the volume will give us the density correct?

Could you possibly show this? Or tell me what it is so I can look it up on this wikipedia link http://en.wikipedia.org/wiki/Shell_theorem Because I don't really understand why the force at a distance r from the centre is determined only by the mass enclosed in a shell of radius r since a...

So I read the article in wikipedia about shell theorem and still unsure of what to do. I mean I don't understand why portion's of the Earth's mass at distance >r can be ignored and only the distance< r should be included. Can someone explain this or is the only way to understand it is through...