A mercury thermometer measures temperature by measuring the volume expansion of a fixed mass of liquid mercury due to a change in density as
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- The density of mercury changes approximately linearly with temperature as ρ=851.5-0.086T in lbm/ft^3 (T in degrees F), so the same pressure difference will result in a manometer reading that is influenced by temperature. If a pressure difference of 14.7 lbf/in^2 is measured in the summer at 95F and in the winter at 5F, what is the difference in column height between the two measurements?arrow_forwardMercury is often used in thermometers. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capillary as the temperature rises. Suppose a mercury thermometer contains 3.380 g of mercury and has a capillary that is 0.200 mm in diameter. How far does the mercury rise in the capillary when the temperature changes from 0.0C to 25.0C? The density of mercury at these temperatures is 13.596 g/cm^3 and 13.534 g/cm^3, respectively.arrow_forwardMeasuring the drop in pressure with a manometer as a function of temperature within a sealed container filled with an ideal gas provides a technique to show that the magnitude of "zero absolute temperature" or OK corresponds to -273 °C. If this experiment is conducted, starting at 1 atm and 67 °C, instead of in boiling water, what will the pressure be, in mmHg, when cooled to 0°C?arrow_forward
- A diver’s watch resists an absolute pressure of 5.5 bar. At an ocean having density of 1025 kg/m3 and exposing an atmospheric pressure of 1 bar, what depth can maximally the diver dive to prevent water inlet into his watch? 1 bar = 105 Pa and g = 9.81 m/s2.arrow_forwardA simple manometer is used to measure pressure of oil (s= 0.8) flowing in a pipe line. Its right limb is open to the atmosphere and the left limb is connected to the pipe. The cente of the pipe is 9 cm below the level of mercury (s=13.6) in the right limb. If the difference of mercury level in the two limbs is 15 cm, determine the absolute pressure of the oil in the pipe in kPa. a.25.11 b.120.58 c.278.6 d.64.74arrow_forwardA vacuum gauge connected to a steam condenser shows that the pressure inside the condenser is 0.751 bar below the atmospheric pressure. If the atmospheric pressure is 1.016 bar, what is the absolute pressure of the steam inside the condenser in kPa?arrow_forward
- A manometer attached to a gas tank indicates that the pressure within is greater than the surrounding atmosphere. The manometric fluid is mercury, which has a density of 13.6 g/cm3. The manometer shows a reading of 54 cm. The atmospheric. pressure is 101 kPa, and the acceleration due to gravity is 9.8 m/s2arrow_forwardThe water in a tank is pressurized by air, and the pressure is measured by a multifluid manometer. Determine the gage pressure of air in the tank if h1 = 0.4 m, h2 = 0.6 m, and h3 = 0.8 m. Take the densities of water, oil, and mercury to be 1000 kg/m3, 850 kg/m3, and 13,600 kg/m3, respectively.arrow_forwardAn airship of 100m3 in size is launched from sea level and it gradually attains height until it reaches the desired altitude. A manometer measuring the gage pressure of the inside filled Helium gas show a reading of 1.2 bar at the altitude of A meters from the ground. Manometer shows reading of 2 bar when it reaches to a height of B meters. Assume; Density of air at point A = 1.00 kg/m3 and at Point B= A = 0.80 kg/m3. You can also assume average density = 0.9 kg/m3 where required. Consider temperature inside the balloon = 10°C and negligible change in temperature during the process. (a) How much payload mass can it carry if the mass of airship itself is 5Kg? Do you expect any change in lifting capacity while moving from point A to point B? (b) Calculate the mass of helium to be expelled out to maintain the constant pressure of 2 bar at point B.arrow_forward
- An airship of 100m3 in size is launched from sea level and it gradually attains height until it reaches the desired altitude. A manometer measuring the gage pressure of the inside filled Helium gas show a reading of 1.2 bar at the altitude of A meters from the ground. Manometer shows reading of 2 bar when it reaches to a height of B meters. Assume; Density of air at point A = 1.00 kg/m3 and at Point B= A = 0.80 kg/m3. You can also assume average density = 0.9 kg/m3 where required. Consider temperature inside the balloon = 10°C and negligible change in temperature during the process. (a) Calculate external atmospheric pressure difference between Point A and B (b) Neglecting the effect of altitude on local gravitational acceleration, determine the height attained from A to B.arrow_forwardThe cylindrical tank with hemispherical ends contains a volatile liquid and its vapor. The liquid density is 800 kg/m3 and its vapor density is negligible. The absolute pressure in the vapor is 120 kPa, and the atmospheric pressure is 100 kPa. What is the height h (in mm) of the mercury (γ =13.6) on the manometer? a. Not listed b. 171.3 c. 208.7 d. 246.2 e. 187.6 f. 193.7arrow_forwardIf 100 ft^3 of atmospheric air at zero Fahrenheit temperature are compressed to a volume of 1 ft^3 at a temperature of 200℉, what will be the pressure of the air in psi?arrow_forward
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