A 5-m-diameter balloon contains helium at 125 kPaabsolute and 15 ° C, moored in sea-level standard air. If thegas constant of helium is 2077 m 2 /(s 2 · K) and balloonmaterial weight is neglected, what is the net lifting force ofthe balloon?( a ) 67 N, ( b ) 134 N, ( c ) 522 N, ( d ) 653 N, ( e ) 787 N

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Q: An air tank of volume 1.5 m3 is initially at 800 kPa and20 °C. At t = 0, it begins exhausting…

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Q: Air at 20 °C and 1 atm flows past a smooth flat plate at Uoo =20.1 m/s (below figure). A pitot…

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Q: A circular cylinder is fitted with two surface-mounted pressuresensors, to measure pa at θ = 1808…

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Q: The tank is filled with air at 20°C and 139 Pa at rest. Tooth from a nozzle under stable weather…

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Q: A two-dimensional Rankine half-body, 8 cm thick, isplaced in a water tunnel at 20°C. The water…

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Q: CONCEPT OF CAPILLARY FALL WITH NEAT FIGURES?

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Q: 04) A flat 30-cm diameter disk is rotated at 800 rpm at distance of 2 mm from a flat, stationary…

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Q: 68. Calculate the volume of a tank (T = 49 C°, p 690 kPa, the rate change of density = 4.2 kg-m- '),…

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Q: Base radius ro Oil 20 A solid cone of angle 104.8 degrees, base 15.2 cm, and density 2745 kg/m3 is…

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Q: A Rankine oval 2 m long and 1 m high is immersed in astream U∞ = 10 m/s, as in Fig. . Estimate (a)…

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Q: Activity No. 1 Title: Pressure, Density. Temperature, and Mach Number Changes Across a Normal Shock…

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Q: diheoat = 8 cm 1 2 Exit Po da = 18 cm Shock wave Figure 4 [Gambarajah 4] (i) Determine the Mach…

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Q: A smooth sphere of diameter d is dropped into a calm ocean. Data: d = 20 cm; Sphere material's…

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Q: Methane, approximated as a perfect gas, is compressedadiabatically from 101 kPa and 20°C to 300 kPa.…

A: Write the given data: Write the properties of methane gas.

Q: A 7-cm-diameter solid aluminum ball (SG = 2.7) and asolid brass ball (SG = 8.5) balance nicely when…

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Q: A 22-cm-diameter solid aluminum sphere (SG = 2.7) is acceleratingat 12 m/s2 in water at 20°C. (a)…

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Q: A buoyant ball of specific gravity SG < 1 dropped intowater at inlet velocity V0 will penetrate a…

A: Now write the expression for the buoyant force.

Q: For those who think electric cars are sissy, Keio University inJapan has tested a 22-ft-long…

A: To find  The percentage of power expended against the air drag η. Given  The power generated by 8…

Q: An airplane fl ies at 555 mi/h. At what altitude in the standardatmosphere will the airplane’s Mach…

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Q: Suppose we wish to analyze the rotating, partly full cylinderof Fig. 2.23 as a spin-up problem,…

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Q: Question 3: A 35 cm by 55 cm block slides on Oil (u=0.81 Pa.s) over a large plane surface. What…

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Q: Consider a large dirigible (like the Goodyear blimp) with length L = 240 m, and average diameter D =…

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Q: A vortex ring is travelling from a less dense environment p, to denser medium p2 so that P2 > P1. If…

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Q: A uniform rectangular plate, 40 cm long and 30 cm deepinto the paper, hangs in air from a hinge at…

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Q: Consider a normal shock wave at sea level with the density ratio, p2/p1 = 2.67. What are the…

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Q: In Falling ball Viscometer, the density of the ball is p=7746.8 kg/m and its radius is 4 mm, the…

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Q: To what head of air (R = 287 J · kg−1·K−1) at an absolutepressure of 101.3kPa andtemperature of 15◦C…

A: Properties of air :

Q: 3. Is there a difference between the values of the water jet force on plate (F₁) and the force…

A: Yes , there is a difference between jet force and force due to weight.

Q: Air flows from a tank through a nozzle into the standardatmosphere, as in Fig.  A normal shock…

A: Given data as per the question Area of throat =10 cm2 Area at exit =14 cm2 The temperature of air…

Q: 1. A solid cone of angle 20, base ro, and density p. is rotating with initial angular velocity mo…

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Q: A cylinder 4 ft in diameter is placed in an air stream where the free-stream velocity is 100 ft/s.…

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Q: A compressed-air tank holds 5 ft 3 of air at 120 lbf/in 2“gage,” that is, above atmospheric…

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Q: Les m. The Q3/A dash pot is 0.2 m in diameter and 0.25 m long and it slides down in a vertical…

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Q: A solid cone of angle 2θ , base r 0 , and density ρ c is rotatingwith initial angular velocity ω 0…

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Q: A cylinder is formed by bolting two semicylindrical channelstogether on the inside, as shown in Fig.…

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Q: What is D’Alembert’s paradox? Why is it a paradox?

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Q: For the pipe-fl ow-reducing section of Fig. P3.54, D 1=8 cm, D 2 = 5 cm, and p 2 = 1 atm. All fl…

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Q: The lift on a spinning circular cylinder, in a freestream with a velocity of 10m/s, is measured as…

A: Given data: V∞=10 m/sH=10,000 ft Need to compare the values of L1 and L2.

Q: Water at 20 ° C fl ows through a long elliptical duct 30 cmwide and 22 cm high. What average…

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Q: A spherical air bubble rises in water. At a depth of 9 m itsdiameter is 4 mm. What is its diameter…

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A: At section1 V=0 (For air) Po1-Patm=WArea=50,000π(3)2=12ρV2exit=12(1.205)Vexit2=1768 Pa Vexit=54.2…

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Q: Air at Ma1 = 2.0 and p1 = 100 kPa undergoes an isentropicexpansion to a downstream pressure of 50…

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Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.