Recent content by ChemIsHard

What exactly is a resonance frequency? I just want to understand what it is, I can solve for it but it's no use if I have no idea what it is.

I just had an idea. P+1/2PV^2+Pgh=pgh+1/2pv^2+P We can cross out both p's since they're both exposed to atmosphere. The first equation has no potential while the second has no kinetic. 1/2pv^2=pgh v=root(2g(35m)) v=26.2 m/s 0.5=26.2*Pi(r^2) Calculate for r then times by two for maximum...

A fire hose must be able to shoot water to the top of a building 35.0 m tall when aimed straight up. Water enters this hose at a steady rate of 0.500 m3/s and shoots out of a round nozzle. i) What is the maximum diameter this nozzle can have? ii) If the only nozzle available has a diameter...

I'm having some trouble with some relatively basic Simple Harmonic Motion problems. First off, when determining the energy of an object do we need to take into account it's height of above the ground? At t=0 it is at 0.50m(highest) and at t=0.5 it's at 0.10m (it's lowest). The maximum...

I was right...I just had different constants than the book... Dumb mistake.

One gram of salicylic acid dissolves in 460 mL of water at room temperature and 15 mL of boiling water. What is the maximum percent recovery that can be achieved using water as a recrystallization solvent assuming the recrystallization mixture is not cooled below room temp.? So I assumed we...

I still get 7.45g...weird. My balloon circumference is 25 cm. The balloon weighs 0.9g. Pair=1.2, PHelium=0.1785 Therefor my radius is 0.125m and my balloon mass is 0.0009kg. 4/3pi(0.125)^3*1.2=Mass+0.0009kg+4/3pi(0.125)^3*0.1785 Mass=0.007457kg=7.5g... Anyone see where I'm messing up.

Still looking for some help. I've run the calculation several times and keep get 7.45g...

Homework Statement A 0.900 g balloon is filled with helium gas until it becomes a 25.0 cm-diameter sphere. What maximum mass can be tied to the balloon (with a massless string) without the balloon sinking to the floor?Homework Equations Fb=VSphere*Pair*Gravity Fg=Vsphere*Phelium*Gravity The...

Alright that's what I thought. Much appreciated! I was freaking out haha.

I'm having a lot of trouble figuring out the difference between a probability density function and a cumulative distribution function. Is the CDF just the integral of the PDF? Thanks in advance.

The question is: A couple is trying to get a child. Their probability of conception in any given monthly cycle is 1/8 (a) What is the mean number of cycles until conception occurs (the count includes the cycle in which conception occurs)? Neglect menopause and limited lifetime of the...

I found four to have stereocentres: 1,2-dibromobutane 1,3-dibromobutane 2,3-dibromobutane 1,2-dibromo-2-methylpropane Can anyone confirm this?

1,2-dibromo-2-methylpropane 1,3-dibromo-2-methylpropane Being the two? The stereocentre is on the first carbon in both cases right? Sorry for the numerous questions, I'm just a little confused!

How many stereocentres are there? 0 correct?