balance

  1. P

    Math for balance physics formula

    No start as time means it. When every unit is 1 as balance, 1m/(sec^2)=1*a. 1m/sec=1*a*t, (1*v=1*a*t). (1/2)*a*(sec^2)=s. (a*t)*t=2*s. t=2*s. 1*s=1*v*t. 2*s=2*v*t, 2*v*t=2*s. 1=1. It is for balance formula 1+1=2.
  2. K

    How To Measure The Mass And Balance Point Of A Human Limb?

    Preferably the forearm. I can't spend big money on x-rays, nor can I chop my arm off. I've asked this elsewhere - LINK I know the volume of my forearm, using the Archimedes method, for 10 equal segments of my forearm. I've also looked at x-rays to work out roughly tissue distribution...
  3. A

    balance and mass

    Question: On the Moon, the force of gravity on an object is only about one-sixth of its value on Earth. Decide whether each of the following would give an accurate measurement of the mass if used on the Moon a) A beam balance like the one in the diagram at the top of the page b) A balance...
  4. S

    Basic ques but getting confused

    Just a simple Pulley question to start with - Imagine an ideal pulley with equal masses M hanging on it on each side. So I raise the level of one mass with my hand, so right now , when i am holding one mass, they are at different levels. Now I let go off the mass. Would they move and try to...
  5. N

    Dry ice sublimation and heat balance

    Hi all, The problem is this: what is the optimum amount of dry ice inside the Styrofoam pack, if we want to received a frozen dough (temp.-18) after 3 days of transportation in temperature 20 C ? My calculations and data are in the attached excel file, but I'm not sure if they are correct...
  6. D

    Analyzing a simple piston-pump (energy balance? deforming control volume?)

    I'd like analyze the internals of the simple pump shown in the attachment. It replaces old engine oil with fresh oil simultaneously, pumping the old into a waste tank and pumping the new into the engine via a make-up tank. I think I'd want to create two deformable control volumes, one for...
  7. A

    Need help understanding rearranging of energy balance

    Hello, so theres the energy balance for a Continuus-Well-Stirred-Reactor in one of my books and at one point they set the following equal (thats not the complete balance but that part is set equal): (Q_f*d_f*h_f - Q*d*h) -Sumoverj(H_j * (Q_f*c_jf - Q*c_j)) = sumoverj(c_jf * Q_f*(H_jf-H_j))...
  8. N

    Moon orbit

    Why does the Moon stay in its orbit without either leaving or approaching the Earth (more than it does)? Naturally, there is gravity and centrifugal forces counteracting one another, but why the balance? A man-made satellite may need occasional speed adjustment. Is there a balancing force...
  9. N

    Big and small floating vessels

    I have often wondered why a big tanker a) can stay stable in the water in spite of its flat bottom and b) why it floats so shallowly. A miniature model of said ship will go deeper and tend to roll much more easily. There seems to be a "scale factor" of some sort but I cannot get my head around...
  10. F

    Will a balance scale change if ...

    cuase i say so this is now gone hahahsdlkfj;laskdf i am really drunk cyper drinking and progamming @!@
  11. S

    Analytical balance source needed...

    Not sure if this is appropriate, please accept apologies if not. I need parts for an antique analytical balance, does anyone know a good source for parts, or another science forum where i might find a source? Regards, Squint
  12. S

    A small doubt on pulley :)

    Just a simple Pulley question to start with - Imagine an ideal pulley with equal masses M hanging on it on each side. So I raise the level of one mass with my hand, so right now , when i am holding one mass, they are at different levels. Now I let go off the mass. Would they move and try to...
  13. K

    Physics lab, Analytical balance, question

    Let's say you are holding a bag of potatoes that you want to buy. The seller tells you that it will cost $0.22 per lb. He then tells you that it weighs 10.0 pounds. You really want these potatoes; there are no potato sellers within miles and you are tired. You have a problem; you don't trust...
  14. arbolis

    Confused about the balance instrument

    I'm not sure how to ask my question in English. I'd like to talk about the instrument "balance", the one that tells you how much your mass is, or your weight is. Precisely that is where I'm confused. Does a balance tells you your mass or your weight? If it is your weight, why it is expressed...