It is planned to lift and move logs from inaccessible forest by means of air balloons. Helium at atmospheric pressure of 101.325 kPaa and temperature of 23.1oC is to be used in the balloons. What minimum balloon diameter will be required for a gross lifting force of 20 metric tons? (Consider k = 1.666 and R =2077.67 J/kg-K for Helium

Q: A fluid having a density of 1 g/cc is in a state with Grashof number 2 × 10° and Prandtl number 0.7.…

A: Given data: ρ=1 g/ccGr=2×106Pr=0.7a=10 m/s2 Need to determine the Rayleigh number.

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Q: (c) The reading of a mercury barometer is 746mm at sea level. The same instrument yields a reading…

A: GivenPo=746mm HgP=665mm Hgρ=1.225 kg/m3S.G=13.6

Q: How many tons of cargo can a 170 m3 cargo ship carry without sinking while 10 tons is empty? (Sea…

A: The given values are - V=170 m3, ρ=1050 kgm3, g=9.81ms2 If body does not sink, then-Fluid Displaced…

Q: centrifuge bowl is to separate two immiscible liquids, one with SG 1.1 and the other with SG 0.9.…

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Q: A 400 kg spacecraft went to Venus where the acceleration of gravity is 5.25 m/s? What is the weight…

A: Given                         Mass, m = 400 kg   Acceleration of gravity =5.25 m/s2

Q: A skydiver skydives from the 700 hPa level. It's a warm, dry autumn day with a surface temperature…

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Q: Calculate the gage pressure in a 4 m^3 vessel occupied by 16 kg of N2O (behaving as ideal gas) at a…

A: Given data Volume of vessel = V = 4 m3 Mass of N2O = m =16 kg Temperature = T = 643 °C = 643 + 273…

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Q: A material is subjected to two mutually perpendicular strains ex=350x10-6, ey=50x10-6 with unknown…

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Q: At 4000 m standard altitude, an aircraft is flying at 300 miles per hour. The air velocity relative…

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Q: pressure vessel with gaseous air inside is shown above. The internal volume of the pressurized…

A: There are two ways for the pressure to remain the same as the volume increases. If the temperature…

Q: Assuming that air is dry. A static air has a ground atmospheric pressure of 100 kPa and a surface…

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Q: A bubble whose inside diameter is 0.06 in has a surface tension of 0.003 lb/ft. What is the pressure…

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Q: Air at standard pressure and temperature is compressed adiabatically to 3 am. What are (a) the…

A: Given: Initial pressure (P1) = 1 atm (standard pressure) and Initial temperature (T1) = 273.15 K…

Q: What is the Mach Number of an air with a velocity of 250 m/s, at a temperature at 2800 meters?

A: Solution: Speed of sound at 2800m=329m/s  (from gas table for compressible flow data book) Mach…

Q: 1. Suppose you are flying a 7,784 kilograms aircraft at 14,630 meters where the air density is…

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Q: Determine the maximum available work [kJ/kg] that could be obtained from a power plant using water…

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Q: 2.For the International Standard Atmosphere below 10 km where the temperature is equal to -20°C,…

A: Given data: h=10 kmT=-20°CPa=101.325 kPa Need to determine the partial pressure of the air.

Q: Over what range of temperature (in Kelvin) do you think it is reasonable to assume that the specific…

A: Given Specific Heat of air To find Temperature range for constant specific heat of air at constant…

Q: Helium at 20° C and low pressure flows around a thin plate 1 m long and 2 m wide. You want the…

A: Given, Length = L = 1 m Width = B = 2 m Temperature = T = 20 oC = 293 K Frictional resistance = F =…

Q: On October 21, 2001, Ian Ashpole of the United Kingdom achieved a record altitude of 3.35 km (11,000…

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Q: A cold wave in the US brings temperature to -53 °C. A cold air mass, known as the polar vortex,…

A: Given  Lowest temperature is Chicago = -30°C

Q: Consider an airplane flying at a pressure altitude of 35,000 ft and a density altitude of 32,000 ft.…

A: Write the given data with suitable variables. PA=35000 ftDA=32000 ft

Q: A minivan is pulled by a tow truck at 60 kph. The boxlike van is 20m long, 6m high, and 3.75m wide.…

A: Given   Velocity, v = 60 km/h = 16.67 m/s    Length, L = 20 m       Density =  0.0023 kg/m3…

Q: Assume an average air density of 1.2kg/m³ and take g=9.7m/sec. The basic barometer can be used to…

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Q: In an internal combustion engine, air at 1 atm and temperature of about 20°C is compressed by the…

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Q: How does the dynamic viscosity of (a) liquids and (b) gases vary with temperature?

A: Hi and thank you for the questions. Since you have asked multiple questions, we will answer the…

Q: Some people think that ice skates slide on ice because ice melts at the pressure exerted by the…

A: To determine the pressure of the student exerted on the ice, we will apply the relation as follows:…

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Q: A centrifuge bowl is to separate two immiscible liquids, one with SG 1.1 and the other with SG 0.9.…

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Q: Derive a formula for the bulk modulus of an ideal gas, with constant specific heats, and calculate…

A: To Explain:  he formula of bulk modulus with constant specific heats.

Q: volume occupied by 8,968 kg of air at a gage pressure of 723 kPa and a temperature of 686 C .…

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