Recent content by Jeann25

Homework Statement When the Sun becomes a red giant star its brightness will increase by a factor of 5000 and its mass will decrease to half of its present mass. When this happens particles smaller than a critical size will be blown out (light force = gravity force) of the solar system by the...

Are they: isothermic -> W=NkT ln(Vf/Vi) adiabatic -> NkdTf/2=-PdV ?

Homework Statement Two identical bubbles of gas form at the bottom of a lake, then rise to the surface. Because the pressure is much lower at the surface than at the bottom, both bubbles expand as they rise. However, bubble A rises very quickly, so that no heat is exchanged between it and...

I figured this out. Please disregard. Thank you :)

[SOLVED] Astronomy Question Homework Statement This is a two part question. I believe the problem I'm running into is coming from the answer to the first question. Q1: Hold your hand 7.5 cm from a 100 watt light bulb and you will feel the same heat sensation that you feel when your hand is...

Homework Statement Write an overall net ionic equation and calculate K for the reaction where CuCl (Ksp = 1.9 x 10^-7) is dissolved by NaCN to from [Cu(CN)2]- Kf = 1.0 x 10^16). Homework Equations The Attempt at a Solution The net ionic equation I've come up with is: CuCl +...

Homework Statement Find a Cartesian equation for the line p + tv, where p=<2,5> and v=<-3,1> Homework Equations The Attempt at a Solution I know the vector form will look likse <2,5>+t<-3,1>. But I'm not sure how to use this information to find the equation of the line in...

Does anyone know of a website or two that would have some good information on Polymerase Chain Reaction?

I think I found it. I would need to take the cross product of 2 vectors from those 3 points to find the normal vector. Then I would use the equation 0 = a(x-x1)+b(y-y1)+c(z-z1), <a,b,c> being the normal vector. For <x1,y1,z1> would I just pick one of the points? Does it matter which one?

I have a general question. If given 3 points, how would I find the equation of the plane containing all these points?

Nevermind. I get it now. Thank you :)

Here's what I did: 1/y y' = x/(1+x²) ln y = 1/2 ln (1+x²)+c y = ce^(1/2 ln(1+x²)) Answer's supposed to be: c*sqrt(1+x²)

How would I start this one? I tried dividing by y, but that does not work y'=xy/(1+x²)

That was very helpful, thank you. Could I also get help with this one pls? :) I just seem to have a hard time figuring out where to start on these. The integral of (sin(ln x))/x dx

Not really sure where to begin on this integral. Hope this reads alright on here. Integral of (sin (x))^1/2)(cos^3(x)) dx