Recent content by chantalprince

Thanks slider :smile:

Homework Statement Hi- this is actually part of my physics homework, but all I need help with deals strictly with algebra. This is my equation: (0.97)(1 + Beta gas (-Ti)) = (1 + Beta steel (-Ti)) Homework Equations The Attempt at a Solution How do I solve for Ti...

Thank you BF.

V = P/T m^3 or liters = Pa or (N/m^2) / (C) I'm still don't understand how it works out. Do you mean work it out with the n and R included?

Homework Statement A child holding a helium filled balloon @ sea level (T= 20 C) let's go of the string. The balloon rises freely several thousand meters, where T = 5 C and P = 0.70 atm. Find the percentage change in the balloon's volume. Homework Equations PV = nRT percentage...

Thanks so much! I worked it out then referenced to the actual density of radon that I found online and it agrees :wink: Thanks again AM.

Homework Statement What is the density of radon gas at 0 degrees C and 1 atmosphere? Homework Equations PV= nRT 0 C = 273 K density = mass/volume g/m^3 The Attempt at a Solution I want density = g/m^3 Below are the units of PV = nRT. I thought that breaking it down...

Ok...I'll sit down with that thought. So, either one works right? They are the same thing??

Ok- but in the book it gives: W = sq. root of (k/m) Instructor gives: W = 2pi x sq. root (k/m) Whats with the 2 pi?? Thanks-

Homework Statement I don't have a homework question exactly, but I need help with an equation please. Angular frequency: W= 2 pi/T = 2(pi)(f) f= frequency And- W = square root of (k/m) k = spring constant m= mass So, wouldn't T = 2 pi / square root of (k/m) ?? My...

Awesome- very helpful! Thanks so much.

Why 10 degrees? I know all of this relates back to the angle that the path swings out somehow. Would it be the same if I did say, a 45 degree angle (easier to meausre) and then counted 45 cycles and divided by 45? What does the angle have to do with it??

Homework Statement Suppose you were kidnapped and held prisoner by space invaders in a completely isolated room, with nothing but a watch and a pair of shoes (with shoelaces of known length). Explain how you might determine whether this room is on Earth or on the moon. Homework Equations...

Ok- I guess that makes sense. However, in other contexts I would probably still be confused with the cycles, revolutions, etc... I just can't wrap my head around it- silly I know :shy: I have some more problems to practice with. Thank you both, chrisk and LP- :smile:

Ok one last question- how exactly do the units work themselves out? This is what I have: 1.89 x 10^5 rad = 2 pi rad/cycle To isolate cycle don't I have to multiply by 2 pi on each side? Even then I would be left with 1/cycle? You said to divide by 2 pi rad/ cycle, but then what's left...