Directions for Balloons and Buoyancy Lab https:/phet.colorado.edu/en/simulation/legacy/balloons-and-buoyancy Balloons & Buoyancy Start on the Gas Properties tab 1. Gravity Press the Reset button In the Constant Parameter controls select None Use the pump to place 100 Heavy Species into the Browser-Compatible tank Version Let the simulation stabilize for 30 seconds (a) Slowly move the Gravity slider to Lots. Provide a screenshot of your simulation. (b) Describe your observations i. Describe what occurred when the amount of gravity went from 0 to Lots. ii. Describe what the distribution of the gas particles tells you about how the pressure and temperature of the gas varies throughout the box. Describe how this is consistent with what is experienced in real life iii. Explain the physics behind why there is less oxygen at higher altitudes. 2. Car Tire Pressure In reading the car manual you see that they tell you to check the tire pressure when the tires are cold, and that it should read 24 psi with the tire gauge (so 24 psi + 14 psi atmospheric pressure gives 38 total psi inside the tire). Unfortunately you have read this only after having driven on them for 100 miles and you have measured that the gauge reads 27 psi. You have 1000 miles more to drive and so it is important to know if they are under-inflated or over-inflated. Fortunately you have taken Physics, so you take out a thermometer and measure that the tire temperature is about 30 Celsius HOTTER than the 25 C air temperature. (a) Given that your current tire pressure reads 27 psi according to the gauge, what would the gauge read for pressure if you allowed the tires to cool to be the same as the air temperature of 25 C (which is the temperature at which you were supposed to check the tires)? Be sure to provide all necessary work supporting your final answer. (b) Explain the physics principles and reasoning you used to calculate this answer. (Again, the simulation can help you figure out how to solve this or check your reasoning. Remember, the absolute temperature and pressure readings in the simulation are not meaningful, but instead consider the proportional changes)