Ch9HWSolutions

# Ch9HWSolutions - terminal velocity(Answer 9.45m/s CSUS...

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CSUS ENGR132 ZHOU HOMEWORK #9 SOLUTION 1. 11.4Estimate the terminal velocity of 1.5 mm plastic sphere falling freely in oil. The oil has a specific gravity of 0.95 and a kinematic viscosity of 10 ିସ m²/s. the plastic has a specific gravity of 1.07 and the volume of sphere is given by ߎ D³/6. (Answer: 1.55mm/s)

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CSUS ENGR132 ZHOU
CSUS ENGR132 ZHOU 2. 11.12 A ping pong ball of mass 2.6 g and diameter 38mm is supported by an air jet. The air at a temperature of 18°C and a pressure of 27 in.Hg, is assumed an ideal gas (p= ρ RT). Ignore buoyancy of air, what is the minimum speed of the air jet (i.e.,

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Unformatted text preview: terminal velocity)? (Answer: 9.45m/s) CSUS ENGR132 ZHOU CSUS ENGR132 ZHOU 3. A paratrooper and a parachute weigh 900 N. if the parachute is 7 m in diameter and the air has a density of 1.20kg/m³, what rate of descent (terminal velocity) will they have if buoyancy of air is ignored? (Answer: 5.7m/s) CSUS ENGR132 ZHOU 4. Estimate the additional power required for the truck when it is carrying the rectangular sign at a speed of 25m/s over that required when it is travelling at the same speed but is not carrying the sign.(Answer: 9.47kW)...
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## This note was uploaded on 05/22/2011 for the course ME 132 taught by Professor Dongmeizhou during the Spring '11 term at CSU Sacramento.

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Ch9HWSolutions - terminal velocity(Answer 9.45m/s CSUS...

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