# alpha2cen

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1. ## atmosphere and air pressure

Water pressure P=(density). g h But, air is compressible fluid. Air density is not constant. It is a function of pressure, P. And, other factors, i.e., temperature, humidity, etc. give an influence on pressure. They can vary with altitude.
2. ## Backward Time and Antimatter

Without an existance of the background back side something, transforming from energy to particle can happen? At the BigBang point, the high energy seperate away the background back side particles too far. But, current low collision energy does not have a capacity to push away the background back side particles so far. So, antimatters are background back side particles which exist not so far away ?
3. ## Help, I'm a dummy...

For safety Is this calculation wrong? FB =~ 5 x total load + platform weight + two pontoons weight FB =~ 4 x total load +700+ two pontoons weight
4. ## atmosphere and air pressure

Other factors, i.e., humidity, temperature variation according to altitude are not considered.
5. ## atmosphere and air pressure

This is a calculated result by using this equation. P2 =P1exp(-C(Z2 -Z1)) T=25oC
6. ## atmosphere and air pressure

On the ground, Z=0 $\Delta P=-\rho \ g \ \Delta Z$ From the ideal gas equation. $\rho =\frac{PM}{RT}=K \ P$ If T is constant, K=constant $\Delta P=-C \ P \ \Delta Z$ C; constant $\Delta Z \rightarrow 0$ $d P=-C \ P \ d Z$ Pressure equation Let $Z_{1}=P_{1}, \ Z_{2}=P_{2}$ $\frac{P_{2}}{P_{1}}=exp (-C \ (Z_{2}-Z_{1}))$ $C =\frac{gM}{RT}$
7. ## E=MC2 and dimensional analysis

In the case of solving mathematical equations, using dimensionless forms of the equations is more reliable.
8. ## Experiment

Paper chromatography. Carrier liquid is water, water+ethanol or water +methanol, etc..
9. ## Coriolis and Centrifugal force visualized in a rotating mass(loop)

This is a Figure about the Coriolis phenomena.
10. ## Help needed for pv=nrt calculation

In general, the piston type compressor is used at the high pressure compression. We can control the compression ratio by reducing the empty space. However, without good sealing, the compressor can not generate high pressure gas output.
11. ## Coriolis effect - angular momentum not conserved?

This Figure represents the intensity of Coriolis effect with latitude.
12. ## Coriolis effect - angular momentum not conserved?

This is the experiment method.
13. ## Coriolis effect - angular momentum not conserved?

This is a Figure about the coriolis effect. The first Figure is about the height effect, and then, the second Figure is about the latitude effect.
14. ## Specific heat problem; enthalpy problem

Before doing this experiment, have you done any experiment about the reference reagents by using the same apparatus? Quantitative experiment always should be exact, even the experiment is in the elementary course.
15. ## Help needed for pv=nrt calculation

The main compression is occuring at the upper part of the machine. Botton part sealing state is not so good. To maintain a good sealing state , suitable spring pressure is required. Sealing is one of the important factor in the compressor design.