# Recent content by chantalprince

1. ### General algebra-

Thanks slider :smile:
2. ### General algebra-

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...
3. ### Ideal gas law-

Thank you BF.
4. ### Ideal gas law-

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?
5. ### Ideal gas law-

Homework Statement A child holding a helium filled balloon @ sea level (T= 20 C) lets 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...
6. ### Ideal Gas Law- finding gas density

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.
7. ### Ideal Gas Law- finding gas density

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...
8. ### Simple Harmonic Motion- From Uniform Circular Motion

Ok...I'll sit down with that thought. So, either one works right? They are the same thing??
9. ### Simple Harmonic Motion- From Uniform Circular Motion

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-
10. ### Simple Harmonic Motion- From Uniform Circular Motion

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...
11. ### Angular velocity- pendulums and ideal springs

Awesome- very helpful! Thanks so much.
12. ### Angular velocity- pendulums and ideal springs

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??
13. ### Angular velocity- pendulums and ideal springs

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...
14. ### Simple Harmonic Motion and the Reference Circle

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:
15. ### Simple Harmonic Motion and the Reference Circle

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...