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Chapter 3 Solutions
Introduction to Heat Transfer
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- Consider the low speed flight of the space shuttle as it is nearing a landing. If the air pressure and temperature at the nose of the shuttle are 1.15 atm and 207 K, respectively what is its specific volume in m^3/kg? Note: R=287 j/kg*k With solution pleasearrow_forwardA closed heavy steel chamber is filled with water at 10°C and at atmospheric pressure. If the temperature of water and the chamber is raised to 40°C, what will be new pressure of water? The coefficient of thermal expansion of the steel is 1.17 x 10-5 per C, assume the chamber is unaffected by the water pressure. Use specific weight of pure water as a function of temperature and pressure for conditions where g = 9.81 m/s². Weight Density/m 9.900 5.350 9.300 4.750 2.700 20.90 bar 60.90 bar 30.80 bar 137.80 bar Hi Temperature (deg Cale C ( PK 90 -PI1750 # W Carrow_forwardKindly check the answer in picture containing the question before submitting the solution the solution.arrow_forward
- Toluene is being stored in a 5 m diameter cylindrical tank under a pressure of 400 kPa (absolute). The tank drains through a 2 cm diameter line located 8 m below the liquid level of the tank, you can assume that the pressure at the outlet of this line is 1 atm. Toluene has a density of 870 kg m-3 and a viscosity of 0.56 mPa s. Using Bernoulli's equation (or otherwise) estimate the liquid velocity in the drain line when the valve is opened, and hence determine how long it will take for the tank drain. Comment as to whether or not you will think the tank will actually take more or less time to drain than the value you have calculated.arrow_forwardThe liquids are positioned as shown in an open tank with a square bottom figure bellow. Solve for the following if the “P atm = 101.325 kPa”.arrow_forwardSolve it clearly pleasearrow_forward
- (a) A liquid with known properties (i.e. density, viscosity, etc. ) is contained in the space Ra 0 the temperature of the outer cylinder (r = Ro) is T; > Tọ. Provide an estimate for the time required to reach steady state (i.c. the time required for the diffusion penetration to reach the surface of the inner cylinder). (b) Define the thermal diffusivity a and its units. To answer the "units question", use only the fundamental units: length L, mass M, time T and temperature e. For example, the units for the velocity are L/T (and not m/sec or miles/hour). (e) You study a problem which involves momentum and energy transfer. Under which condition(s) the problem velocity and temperature are identical, i.e. are given by the same equation if we scale both the velocity and the temperature with their corresponding scales?arrow_forwardFor an isothermal layer of the standard atmosphere, prove that: e= =e(80/RT)(h-hi) Pi Hint: You can start from the hydrostatic equation and the ideal gas law!arrow_forwardA vessel of capacity 3 m³ contains the mass of 7 kg of Oxygen gas at a pressure of 180000 N/m? and a temperature of 310 K. Find the gas constant of Oxygen gas in J/kgK. Gas constant, (J/kgK) =arrow_forward
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