12:55 pm Wed 28 Aug Engineering 5th year Q Home Insert Draw View A Text Mode Lasso Select Insert Space ICS 03: The temperature of air inside a hot air balloon can reach up to 100°C. This temperature change causes the density of air inside the balloon to be 0.95 kg/m³. If the air outside the balloon is 20°C with Pair = 1.204 kg/m³ What is the required volume of balloon to lift a 2 kN carriage + canvas and 4 kN worth of people? HINT: Draw a FBD and include the weight of air inside the hot air balloon.

At high altitudes, pressure cooker is preferable for cooking because the boiling point of water (a) reduces due to higher atmospheric pressure (b) reduces due to lower atmospheric pressure (c) increases due to reduced gravitational force (d) reduced due to increased ozone content in the

The data listed below is from a passenger hot air balloon. The balloon is designed to lift 10-people (80 kg each person). The balloon consists of a basket, a burner- propane tank system. It will lift up when the cold air trapped inside warms up by the burner. Density of air inside the balloon is 99°C: 0.9486 kg/m³, density of air outside balloon is 20°C (ambient): 1.2041 kg/m³ Mass (kg) Balloon Basket Burner Propane tank   113.4 kg 63.5 kg 22.7 kg 183.7 kg      Assume the balloon is a sphere shape, volume =(4/3)pi R3. a. Determine the minimum diameter of the balloon that would have a total lifting force to balance the weight of balloon, basket, burner, propane tank and 10 people? b. If the balloon is converted to survey the weather, it will be filled with hydrogen gas (H2). Assume the weight of the people (800kg) is now replaced by onboard equipment,  what is minimum diameter needed to keep it afloat at 18km above the surface of the earth?

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Compare the pressure of 30 kg of air in a vessel of temperature 300 K and volume 8 m3 by considering real gas and perfect gas.

For most gases at standard or near standard conditions, the relationshipamong pressure, density, and temperature is given by the perfect gasequation of state: p = ρRT, where R is the specific gas constant. For airat near standard conditions, R = 287 J/(kg · K) in the International System of Units and R = 1716 ft · lb/(slug · ◦R) in the English Engineering System of Units.  Using the above information, consider the following two cases: a. At a given point on the wing of a Boeing 727, the pressure andtemperature of the air are 1.9 × 104 N/m2 and 203 K, respectively.Calculate the density at this point.b. At a point in the test section of a supersonic wind tunnel, the pressureand density of the air are 1058 lb/ft2 and 1.23 × 10−3 slug/ft3,respectively. Calculate the temperature at this point.

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The figure shows a 50.-kg frictionless cylindrical piston that floats on 20 mol of compressed air at 45.°C. How far does the piston move if the temperature is increased to 600 °F? (This is an Isobaric process and the piston is at sea level under an atmospheric pressure of 101.3 kPa). The values given in the figure are: 50. Kg, 30.°C, and 10. cm.

What power in KW is required to lift a 1500 kg mass a distance of 80 m in 14 sec? The correct answer is 84.09 KW

Consider the following mass distribution, where x- and y- coordinates are given in meters: 5.0 kg at (0.0, 0.0) m, 5.0 kg at (0.0, 6.0) m, and 3.0 kg at (8.0, 0.0) m. Where should a fourth object of 5.0 kg be placed so that the center of gravity of the four- object arrangement will be at (0.0, 0.0) m?  Enter the y-coordinate.