A deep sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea level, where dry air contains 20.9% oxygen and has a total pressure of 1.01 ✕ 105 N/m2. (a) What is the partial pressure (in N/m2) of oxygen at sea level? N/m2 (b) If the diver breathes a gas mixture at a pressure of 2.00 ✕ 106 N/m2, what percent oxygen should it be to have the same oxygen partial pressure as at sea level? %

The atmospheric pressure on earth is 101kPa. The surface area of the earth is related to its mean radius r which has a value of 6400km. Calculate the mass of the earth’s atmosphere, assuming g does not vary with height above the Earth’s surface. Calculate the number of nitrogen and oxygen molecules present on this atmosphere (take note: molecules).

A mixture of water (density=1000 kg/m3) and vapor flowing with a mass rate = 7 kg/sec in a pipe of 1000 m long and 50 mm diameter, the gas fraction is 20%,then the volumetric rate of the water is: 1

A mixture of water (density =1000 kg/m3) and vapor flowing with a mass rate = 7 kg/sec in a pipe of 1000 m long and 50 mm diameter, the gas fraction is 20%,then the volumetric rate of the water is:

The pressure in newtons per square meter (N/m²) of a gas in a cylinder is given by P = 207 - with T in Kelvins (K) and V in cubic meters (m³). (a) If T is increasing at a rate of 9 K/min with V held fixed at 2.5 m', find the rate at which the pressure is changing when T = 90 K. Pa/min (b) If T'is held constant at 90 K while V is decreasing at the rate of 9 m'/min, find the rate at which the pressure is changing when V = 2.5 m2. i Pa/min eTextbook and Media Hint Save for Later Attempts: 0 of 3 used Submit Answer

A deep-sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea level, where dryair contains 20.9% oxygen and has a total pressure of 1.01×105 N/m2. (a) What is the partial pressure of oxygenat sea level? (b) If the diver breathes a gas mixture at a pressure of 2.00×106 N/m2, what percent oxygen shouldit be to have the same oxygen partial pressure as at sea level?

BP-11 A tank of water has a spout located 13.5 cm below the water line. The tank is sealed and the pressure of the air above the water in the tank is kept at 4.65 atm. The diameter of the spout is 0.250 cm, which is very small compared to the diameter of the tank. Assume that the the air outside of the tank is exactly 1.00 atm. pressure of (a) If the spout is opened, at what speed (in units of m/s) does the water come out? Hint: you'l11 need to use both Bernoulli's equation and the equation of continuity. (b) What is the volume flow rate of the water coming out of the tank, in units of cm/s? (c) At this rate, how long would it take to fill up a water bottle 13.5 cm with a volume of 1.00 liter? a 99+ hp

The gage pressure of an automobile tire is measured to be 210 kPa before a trip and 220 kPa after the trip at a location where the atmospheric pressure is 95 kPa. Assuming the volume of the tire remains constant and the air temperature before the trip is 25°C, determine air temperature in the tire after the trip.

(1) Hydrostatic balance states Әр Equation -1 -Pg, where p is pressure, z is altitude, pis density and g is the acceleration due to gravity. It can be shown that the reciprocal of hydrostatic balance also applies. That is Equation -2 Əz Əz Әр 1 pg Use the ideal gas law (p = pRT, where R is the gas constant for dry air and T is temperature) to eliminate p from (2). (2) Under geostrophic balance, the following balance is approximately satisfied Equation -3 fu = -g (³3), ду where f is the Coriolis parameter, u is the zonal wind, y is meridional distance and z is altitude. (Note that the derivative on the right hand side is taken at constant pressure.) Differentiate (3) with respect to p, and use your expression from part 1 to obtain an expression relating du/ap and OT/oy. This expression is called "thermal wind balance".