What is the mass in kilograms of the air in a scuba tank that has an internal volume of 0.0100 m and is pressurized so that the density of the air in the tank is 240 kg/m? 3

A simple thermometer is formed by taking a large spherical container of volume 1.13m³ and filling it with an ideal gas. Then, a U-shaped tube is attached that is very narrow so that very little fluid/gas can fit inside the tube. The tube has a small quantity of a fluid of density 1200kg/m³ placed in it. In equilibrium at room temperature - 21.9°C - the height of the fluid on both sides of the U-shaped tube are level. This is illustrated in the image below. What is the temperature of the gas in the spherical container when the left side of the fluid is 13.25cm higher than the right side of the fluid in the U-shaped tube? Atmospheric pressure is 101000Pa. °C

An airplane passenger has 100 cm3 of air in his stomach just before the plane takes off from a sea-level airport. What volume will the air have at cruising altitude if cabin pressure drops to 7.50 X 104 N/m2?

An automobile weighing 1.19 x 104 N has weight equally distributed over its wheels. The weight of the car causes each tire to be slightly flattened on the bottom so that there is a surface area in contact with the road. The gauge pressure of the air in the tire is 1.90 x 105 Pa (27.55 lb/in2). Find the area of contact, assuming that the only forces on the section of tire in contact with the road are the air pressure and the normal force exerted by the surface of the road. (The answer is not 0.06263 m2)

Part A -  A cube of volume 3.0 ×10-3 m3 (3.0 L) is placed on a scale in air. The scale reads 267 N. What is the material?     Answers: Copper, ρ = 8.9 × 103 kg/m3   Aluminum, ρ = 2.7 × 103 kg/m3   Gold, ρ = 19 × 103 kg/m3   Lead, ρ = 11 × 103 kg/m3   Part B - An aluminum block of volume 200 × 10-6 m3 is held by a string at rest in oil as shown. ρAL = 2700 kg/m3, ρoil = 900 kg/m3, and g = 10 m/s2.  Now the same block is placed in water, still completely submerged. Water is more dense than oil. The net force on the block will  ______.       Answers: decrease   increase   stay the same   Part C -  Now the same block is placed in water, still completely submerged. Water is more dense than oil. The buoyant force on the block will  ______.       Answers: stay the same   decrease   increase   Part D -  Now the same block is placed in water, still…