201_Pressure - Pressure 1. A fluid sample has a density of...

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Pressure Row 201 1. A fluid sample has a density of 8.99 × 10 –2 kg/m 3 and a mass of 150 g. Determine its volume. 1kg 150g 0.150kg 1000g m ⎛⎞ == ⎜⎟ ⎝⎠ m V ρ = ( ) () 3 2 0.150 1.67m 8.99 10 m V = × 2. Determine the density of a 75 g mass occupying a volume of 6.0 cm 3 ? Two ways to do this. You could convert mass and volume and them calculate 75g 0.075kg 1000g m 3 3 33 3 3 1m 6.0cm 0.000006m 100 cm V When a variable is cubed its conversion must be cubed ( ) 3 0.075 12500kg m 0.000006 m V = Or you could solve for density in g/cm 3 and then convert 3 3 12.5g cm 6cm m V = 12.5g cm 1000 12500kg m ×= To do this easier method you’d have to memorize the conversion factor from g/cm 3 to kg/m 3 . a. Pg h = ( ) ( ) 5 1000 9.8 27 2.65 10 Pa P × 3. A pump sits at the bottom of a fresh water reservoir. The reservoir is 27 m deep. a. Determine the gauge pressure. b. Determine the absolute pressure. b. 0 PP g h = + ( ) ( ) ( ) 55 1 10 1000 9.8 27 3.65 10 Pa P + =
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