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17 Cards in this Set
- Front
- Back
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Temperature
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Measures thermal energy the Kelvin scale is the absolute scale, we can never reach 0 degrees Kelvin.
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Fahrenheit
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F=9/5 C + 32
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Celcius
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C = 5/9 (F - 32)
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Kelvin
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C = K - 273
K = C + 273 |
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What is 10 C in Fahrenheit
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EX 9/5*10/1 =90/5 =18+32=50
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What is 40 F in C?
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5/9 (40 - 32)=5/9 (8)40/9= 4.44 C.
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What is 70 C in K.
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K = 70 + 273 = 343 K
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What is 100 F in K.
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C = 5/9 (100-32) = 37.8
37.8 + 273 = 310.8 K |
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Density
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Density measures the compactness of matter. The more compact the bigger the density value is.
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Density formula
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D = m/V.
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What is the density of sodium chloride 10 cm cubed has a mass of 21.64 g?
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21.64/10 = 2.164 g/cm cubed
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Finding mass using density and volume.
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M = D * V
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Finding Volume using mass and Density
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V = m/D
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What is the volume of 54g of Al if its density is 2.7 g/mL
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V = 54/2.7 = 20 mL
V = m / D |
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Densities of substances are affected by temperature and pressure -(for gases)
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DH2O (5C) ≠ DH2O (80C)
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Percent error
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% error = measure value - actual - actual value / actual value * 100
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A ball has an actual mass of 4.00 g, you measure it to be 4.05 g. What is your percent error?
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4.05 - 4.00/4.00 *100 = 1.25%
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