Q2) find is(70kpa)(hl=0.2,h2=0.4,h3=0.6)(png =13600kg/m3,poil=850kg/m3) the pressure at point (1) if the atmospheric pressure AIR WATER Menury
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- The absolute pressure of a gas in an enclosed cylinder on a day is 3.67 A low pressure storm comes upthe conditions in the gas cylinder remain unchanged does the absolute pressure of the gas increase, decrease, or remain the same? What about the gauge pressure?Calculate the pressure in kPa in A, B, C, D a. -7.848, 4.905, 4.905, 21.67 b. -7.848, -4.905, 4.905, 21.67 c. 7.848, 4.905, -4.905, -21.67 d. 7.848, 4.905, 4.905, 21.67Jessie is an astronaut with a mass of 66 kg in an orbit (a fast moving circular path) around the earth. She is 477000 meters above the ground, and has an orbital speed of 9000 metres per second. For the following questions, assume the mass of the earth is 6.0e + 24 kilograms, and the radius of the earth is 6371000 metres. a) Which of the following factors affect the gravitational force of attraction between Jessie and the earth? Speed of Jessie Orbiting the Earth Jessie's Mass Height above the ground of Jessie Earth's Mass Radius of Earth b) James, an astronaut (with the same mass as Jessie) intends to use a hot air balloon to get to Jessie. How much buoyancy force is required to enable James to float at the same height as Jessie. FB N
- A helium balloon with an initial volume of 0.75?3at 1.05atm is released and floats upwardsuntil the air pressure is 0.88atm. What is the new volume of the balloon?Estimate how many molecules of air are in each 2.0-L breath you inhale that were also in the last breath Galileo took. Assume the atmosphere is about 10 km high and of constant density. What other assumptions did you make?Example 1: Find the height h? Solution: T 2 m 0.1 m -76 mm Hg Air Water A Hg Air S.G=0.8 20 kPa 1 m
- A wind tunnel draws atmospheric air at 20°C and 101.3 kPa by a large fan located near the exit of the tunnel. If the air velocity in the tunnel is 80 m/s, determine the pressure in the tunnel.A container of mercury, ρressure=13,600, has a height of 50 cm and is open to the air. What is the pressure at the bottom of the container under the mercury?2
- Problem 3: Consider a stationary horizontal slab of air of height dz. Since the slab is at rest, the pressure p holding it up from below must be balanced by the pressure from above PLUS the weight of the slab. a) Derive a formula for dP/dz the variation of pressure with altitude, in terms of the mass density p (greek letter rho) of the air. b) Using the ideal gas law, rewrite the air density in terms of the average mass m of the air molecules and other variables. Combine your result with part (a) to derive a differential equation relating dP/dz to P. Show then that pressure obeys the differential equation: dP тg dz kT c) Assume constant temperature T and solve the differential equation in part (b) for pressure P as a function of height z. Assume that P(z=0) is given. Show that the pressure obeys: P = P(0)e-mgz /kT Show also that the density obeys a similar equation.S:44)What is the absolute pressure of the air in your car’s tires, in psi, when your pressure gauge indicates they are inflated to 35.0 psi? Assume you are at sea level.