'Pa p' presentation slideshows

Thermodynamics

Thermodynamics. What is the pressure of 42 N on a 20. cm x 32 cm plate?. A = (.20 m)(.32 m) = .064 m 2 P = F/A = (42 N)/(.064 m 2 ). 660 Pa. Thermodynamics. Adella Kutessen notices what change in temperature if 512 g of iron absorbs 817 J of heat ( c = 450. J o C -1 kg -1 ).

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Significant Figures

Significant Figures. Used to report all precisely known numbers + one estimated digit. Rule #1. Every nonzero digit is significant Examples: 24 = 2 3.56 = 3 7 = 1. How many Significant Figures are in the number 3994 g. 4 5 2 One million! 0. Rule #2.

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Density

Density. ? = m/V. Concentration. C = m/V. mg/L (g/m 3 ), ? g/L, ppm , ppb. Molarity Mass percent Volume percent Mole fraction. Figure 2.1 Schematic of cylinder described in Example 2.4. Gas phase. ppmv = volume or mole fraction multiplied by 10 6.

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The House of Representatives

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