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.

The data 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, Assume the balloon is a sphere shape, volume =(4/3)pi R3 Mass (kg) Balloon Basket Burner Propane tank   113.4 kg 63.5 kg 22.7 kg 183.7 kg    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?

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

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.