In a differential equation, the unknown variable is also known as ___________
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In a differential equation, the unknown variable is also known as ___________
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- number 1 A food product containing 80% moisture content is being frozen. Estimate the specific heat of the product at -8 ° C when 80% of the water is frozen. The specific heat of the dry product is 2 kJ / (kg ° C). It is assumed that the specific heat of water at -10 ° C is the same as the specific heat of water at 0 ° C, and that the specific heat of ice follows the function Cp es = 0.0062 T Frozen + 2.0649. Cp of frozen product = kJ / kg ° C.number 1 A food product containing 75% moisture content is being frozen. Estimate the specific heat of the product at -10° C when 85% of the water is frozen. The specific heat of the dry product is 2 kJ / (kg ° C). It is assumed that the specific heat of water at -10 ° C is the same as the specific heat of water at 0 ° C, and that the specific heat of ice follows the function Cp es = 0.0062 T Frozen + 2.0649. Cp of frozen product = kJ / kg ° C.Drag and Drop the correct answers in the blanks. A mass mis hanging from the end of a vertical spring that has a spring constant k. The equilibrium position of the mass, yo, is The total potential energy of the mass when it is displaced by s from the equilibrium position is given by Y. is zero + U(s) = ks + positive * negative 1 1 ks+ 21 + U(s) ks² + mgyo %3D U(s) mgyo
- 1. Steady state heat flow means, (a)Negligible flow of heat, (c)Heat flow independent of time (d)Uniform rate in temperature rise of a body 2. The ratio of heat flow QI/Q2 from two walls of same thickness having their thermal resistances as Rth1=8 Rth2 (b)No difference of temperature between the bodies will be: b) 0.25 3. The critical thickness of insulation for hot pipe is equal to: b) unity a) 0.125 c) 2 d) 4 a) h/k 4. Which of the following expresses thermal diffusivity of a substance in terms of thermal conductivity(k), density (p) and specific heat (C) a) (p2 k C) c) zero d) k/h d)(p C/k2) b) (1/ p k C) 5. The boundary condition of the end insulated fin are: c)(k/ p C) dT a) - kA() = 0 and T-To at x-0 b) - kA().- = 0 and T-Too at x=L dx d) None of them c) T=0 at x=0 and q=0 at x=L 6. The equation for the temperature profile inside a solid cylinder with heat source is: T-T a) T=T, + x b) =1-( !! 2k T,-T (R²-r) T-T = 2k c) d) None of them 7. Plane wall with heat generation, at x-0…Given: Consider an adiabatic steam turbine operating at steady-flow conditions. The known operating conditions are: Inlet conditions Exit (outlet) conditions Pressure (MPa) Temperature (°C) Velocity (m/s) Steam quality Mass flow rate (kg/s) Elevation (height) (m) 10 450 0.010 80.01 50.01 91.9 % 12.01 9.0 9.0 Required: Draw clear and consistent schematic for the problem representing the inlet and exit (outlet) conditions and label your schematic with the given conditions. Analyze the problem systematically using step-by-step CV energy and mass analyses, justify the equations, state your assumptions, and determine the following (circle your final answers): (a) The specific enthalpy values at inlet and exit of the turbine. (b) The mass flow rate of steam at exit. (c) The specific heat transfer. (d) The rate of change in the kinetic energy of the steam between inlet and exit. (e) The power output generated by the turbine. (f) The specific work output. (g) The specific volumes at inlet and…Thermodynamics: Please show me how to solve the following practice problems in step by step solution (Thank you so much!)
- Give definition of unreliability F(t)of a component as function of time.hello my question is about thermodynamics. and i am having troubles with writing energy balances . more specifically energy balance on closed , open , steady state and for throttling deviceThe process variable of a system which varies with respect to time is called dynamic. True or False
- 2. An electric heater is used to heat a slab, and the following model has been derived to predict the slab temperature: dT C3Q(t)- a(T – T) dt %3D | where T is the slab temperature in °R, Q(t) is the rate of heat input in Btu/h which is an input variable, C = 250 Btu/ºR, Ts = 530°R and a = 5x10-8 Btu/h-°R*. %3D %3D %3D (a) Obtain a linearized model around a slab steady state temperature of 650°R. (b) Obtain the transfer function for the process relating the slab temperature to the heating rate. Determine the time constant and steady state gain of the linearized model.a. True/False Given 1-D steady-state conduction through a wall with uniform heat generation, the heat transfer (Q. W) is constant throughout the wall. TRUE FALSE b. True/False Consider convection heat transfer acting on an object that is in contact with a fluid at temperature T-. Ifh (the convection coefficient) gets very large. it tends to drive the surface temperature of that object to the fluid temperature T-. TRUE FALSE c. Short answer You need to calculate the temperature at the free end (tip) of a long fin. The boundary condītion you should NOT use is: Circle one! Convective tip Adiabatic tip Infinite finSolve the following completely. 1. In a boiler observation made were as follows: Rate of feed water per hour = 1,000 kg Temperature of feed water = 30°C Steam pressure = 10 bar Quality of steam = 0.9 Coal consumption rate per hour = 100 kg Calorific value of coal = 33,000 kJ/kg Mass of ash and unburnt coal= 10 kg/h Calorific value of ash and unburnt coal = 3,000 kJ/kg Quantity of flue gas/kg of coal = 20 kg %3D Discharged gas temperature = 300°C Atmospheric temperature = 20°C Specific heat of flue gas = 1.03 kJ/kg K Calculate: (i) Boiler efficiency. (ii) Percentage of heat loss in flue gas. (iii) Percentage of heat loss to ash and unburnt coal. (iv) Percentage of heat loss unaccounted for.