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- The density of air is 1.3 kg/m3 at sea level. From your knowledgeof air pressure at ground level, estimate the height ofthe atmosphere. As a simplifying assumption, take the atmosphereto be of uniform density up to some height, afterwhich the density rapidly falls to zero. (In reality, the densityof the atmosphere decreases as we go up.)The height of Mount Mayon is 2463m. If the pressure at the top of the volcano is 549.41mmHg and the average unit weight of air in the area is 11.69N/m3, what is the expected atmospheric pressure (mmHg) reading for a mecury barometer at the base of the volcano?The basic barometer can be used to measure the height of a building. If the barometric readings at the top and at the bottom of a building are 675 and 695 mmHg, respectively, determine the height of the building. Take the densities of air and mercury to be 1.18 kg/m3 and 13,600 kg/m3, respectively.
- If diameter of pipe is 5cm, denisty of water is 998.2kg/m^3, and dynamic viscosity of water is 1.002*10^-3Ns/m^3 what should the value of the reynolds number be and find the flow rate in m^3/h that is expected for transition to turbulence.How high would the level be in a barometer at normal atmospheric pressure if honey (D = 1400 kg/m3) is used as a working liquid?What is the approximate mass of a column of air 1 cm2 in area that extends from sea level to the upper atmosphere? What is the weight of this amount of air?
- The Earth is approximately a sphere of radius 6370 km.Taking the average barometric pressure on the Earth’ssurface to be 730 mm Hg, estimate the total mass of theEarth’s atmosphere.calculate the manometric pressure in A, pa, when ∆h=10cm, h1=20cm and h2=300cm. The gauge is open to atmosphere. Consider the negligible specific mass of air. data: Yh2o = 10000 n/m3 and Yhg=136000 n/m3 Choose the correct alternative: a)10,0kPa b)5,0kPa c)15,86kPa d)12,0kPa e)11,6kPaEvery few years, winds in Boulder, Colorado, attain sustained speeds of 43.0 m/s (about 100 mph) when jet steam descends during early spring. Approximately what is the force due to the Bernoulli equation on a roof having an area of 220m2? Typical air density in Boulder is 1.14kg/m3, and be corresponding atmospheric pressure is 8.89104 N/m2. (Bernoulli’s principal as stated in the text assumes laminar flow. Using the principle here produces only an approximate result, because there is significant turbulence.)
- Find the altitude where the density is 0.268 Kg/m3 in the standard atmosphere.Calculate the pressure at depth 2 m using P = ρgh.Suppose a 3.00-N force can rupture an eardrum. (a) If the eardrum has an area of 1.00 cm2 , calculate the maximum tolerable gauge pressure on the eardrum in newtons per meter squared and convert it to millimeters of mercury. (b) At what depth in freshwater would this person's eardrum rupture, assuming the gauge pressure in the middle ear is zero? Strategy for (a) The pressure can be found directly from its definition since we know the force and area. We are looking for the gauge pressure.