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  1. V

    What is an inverse meter?

    Okay so if I have the 1/lambda = R (1/nf^2 - 1/ni^2) equation, how would I go about plugging it in? Is it any different than plugging in any other numbers?
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    What is an inverse meter?

    Hi, I'm doing some astronomy work and one problem involves using Rydberg's constant. However, it is inverse meters and I'm confused. Does that mean that it is 1/109737361.6 m? Thanks.
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    Pv=nrt and PV diagram

    Wait, I'm still confused. I've never done any of this before because my teacher doesn't teach and he sprung this on us within two days of the section. How would I figure out the work then for each part? How would I draw the diagram?
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    Pv=nrt and PV diagram

    Homework Statement One mole of an ideal gas at an inital tempreature of 300K and pressure of 4 atm is carried through the following reversible cycle: a) It expands isothermally until its volume is doubled. b) It is compressed to its original volume at constant temperature. c) It is...
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    Mechanical Energy into Thermal

    Homework Statement Students are designing an experiment to demonstrate the conversion of mechanical energy into thermal energy. They have designed the apparatus shown in the figure above. (To see the image, visit http://www.cs.utexas.edu/users/mfkb/Halo/CPL/Physics1998APexam.pdf [Broken] and...
  6. V

    Energy Level Diagram

    But it's physics, AP physics actually. I've asked a few chem buds and they don't get it.
  7. V

    Energy Level Diagram

    Anyone? Anyone?
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    Energy Level Diagram

    Homework Statement A monatomic gas is illuminated with visible light of wavelength 400nm. The gas is observed to absorb some of the light and subsequently emit visible light of both 400nm and 600nm. The initial state is -5.0 eV and the ionized atom (continuous energy levels) is 0 eV. a) Draw...
  9. V

    Underwater Pressure sunken ocean liner

    No, I know that. That's why I subtracted one. My work is right though, yes?
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    Underwater Pressure sunken ocean liner

    Homework Statement While exploring a sunken ocean liner, the principal research found the absolute pressure on the robot observation submarine at the level of the ship to be 413 atmospheres. The density of the surrounding saltwater was 1025kg/m^3. Calculate the gauge pressure on the sunken...
  11. V

    Conservation of Energy/Angular Momentum

    Nevermind. I was being stupid and forgot they are two different H's
  12. V

    Sphere rolling down a ramp linear acceleration

    Oooh okay. That really helps. (I didn't originally use force equations to find the linear acceleration). I used vf^2 = vi^2 + 2ad. Is the correct answer: (2mgsin(theta))/7?
  13. V

    Conservation of Energy/Angular Momentum

    Okay this is going to sound really confusing but am I on the right path for the block one? I got to the point where gh = 1/2(vi)^2 - ukg(cot(theta))h At this point, do I plug in what I got for H in part (a) since it wants it says "in terms of h found in part a"? What exactly are they asking...
  14. V

    Sphere rolling down a ramp linear acceleration

    Yes, I did. Thanks for your help. Would you be able to explain how I would get the frictional force then? Is it just F = m times that or is it -mgsin(theta) because it's on a ramp?
  15. V

    Sphere rolling down a ramp linear acceleration

    That requires that I find the frictional force, but that's the next question so there has to be some way I can do it without knowing the friction force.
  16. V

    Sphere rolling down a ramp linear acceleration

    Homework Statement "A solid sphere of radius R and mass M is initially at rest at the top of a ramp. The lowest point of the sphere is a vertical h above the base of the ramp. It is released and rolls without slipping down the ramp. Determine the linear acceleration while the sphere is...
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    Conservation of Energy/Angular Momentum

    Homework Statement Hi. The problem is "A wooden block of mass m slides with an initial speed of vi up a straight incline that makes an angle of theta with the horizontal. If the incline is rough with a coefficient of kinetic friction uk, determine the maximum height it rises in terms of h...
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    Conservation of (Angular) Momentum

    Sorry. Realize this is in the wrong spot.
  19. V

    Conservation of (Angular) Momentum

    Hi. The problem is "A wooden block of mass m slides with an initial speed of vi up a straight incline that makes an angle of theta with the horizontal. If the incline is rough with a coefficient of kinetic friction uk, determine the maximum height it rises in terms of h found in part a (which...
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    Energy Speed of Ball Question

    So is it that t = .5 seconds? Because: position of blob = 1/2at^2 + 5 position of ball = vit + 1/2at^2 set them equal and discover 5 = vit 5 = 10t t = 1/2 ??? Is that at all right? I know I'm a nussance.
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    Energy Speed of Ball Question

    Oooh, let me try with the inital height.
  22. V

    Energy Speed of Ball Question

    Right, so what I ended up doing was: position of the blob = 1/2at^2 position of the ball = vit + 1/2at^2 Now since the ball and blob are going in the opposite direction, I make one of them negative. -1/2at^2 = vit + 1/2at^2 (I solved for vi in part a) 5t^2 = 10t - 5t^2 10t^2 = 10t t = 1...
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    Energy Speed of Ball Question

    Well I understand that you can use d = vit + 1/2at^2, but when I set that equal to the negative distance of the other item, I get 1s. That is wrong though, right?
  24. V

    Energy Speed of Ball Question

    Hi, I have been given the same exact question for a homework assignment of mine and I'm not understanding how to find the time exactly. Could someone please be a little more specific than pi-r8, even though he did a great job, on part b. Is there a way to do it without calculus, possiby...
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