Convection heat transfer from a plate (2 m x 2 m) is 450 W. If surface temperature of plate is 450 K and surrounding temperature is 300 K, what will be value of heat transfer coefficient?
Q: Please read the instructions carefully and do what are asks. Illustrate and show the COMPLETE SOLUTI...
A:
Q: Question 1: For the following truss structure (with members AB, BC, AD, DE, BE, CF and FG all of 60 ...
A:
Q: A refrigerator uses refrigerant-134a as the working fluid and operates on the vapor-compression refr...
A: Answer: The comparison of actual cycle with the ideal vapor compression refrigeration cycle is shown...
Q: A bronze bar is fastened between a steel bar and aluminun bar as shown. Find the largest value of P ...
A: Given:As=480 mm2Ab=650 mm2Aa=320 mm2Es=200 GPaEa=70 GPaEb=83 GPa
Q: During inelastic collision of two particles, which one of the following is conserved ? 1. total line...
A: Let us first understand which quantity is conserved in which type of collision. In all types of coll...
Q: A amne alenmónt is gubjeafed fo fhe foclaing biranial of sfrex: Ox=75 mpa Oy =15 mPq %3D てy35 mq she...
A: The calculated factor of safety (FOS).
Q: A single full penetration weld pass is made on a thin steel plate using a power input of 4 kW, and w...
A: Write the given data in the problem. Q=4 kW η=85% ux=10 mm/s ρc=0.005 J/mm3·°C t=5 m...
Q: Figure shows an airplane moving horizontally with a constant velocity of +100 m/s at an ,-100 mis al...
A: All the values are calculated using equation of motion, for calculating the value of time, we applie...
Q: This question requires the use of the extracts from the tables of thermodynamic properties supplied....
A:
Q: The temperature of the air in a dryer is maintained constant by the use of steam coils within the dr...
A:
Q: A domestic refrigerator sits in a kitchen, switched on, with the refrigerator door wide open. The ki...
A: The energy taken by refrigerator is less than energy transferred to environment is high. Then the it...
Q: air-fuel ratio for this combustion process.
A: Determine the air-fuel ratio for this combustion
Q: A amle olenmont is geabjeafed fo fhe follaing biranial of sfresx: O-75 mpa 1o4=15 Mpa %3D てx 35 mq s...
A:
Q: Question 2: For the following truss structure (with members AB, BC, AD, DE, BE, CF and FG all of 60 ...
A: Consider the free-body diagram for the joint D as shown below.
Q: have three blocks of different dimensions as follows b,(400mmx250mm), b2(400mmx3000mm), b3(400mmx400...
A:
Q: A closed system receives 250 kJ of energy by the work mode and loses 150 kJ by the heat mode. It is ...
A: Given: The amount of energy receive by closed by work is W=250 kJ. The amount of energy lost by sys...
Q: 4-26. If the 1500-lb boom AB, the 200-1b cage BCD, and the 175-lb man have centers of gravity locate...
A:
Q: P3.34 A rocket motor is operating steadily, as shown in Fig. P3.34. The products of combustion flowi...
A:
Q: determine stress amplitude and stress ratio
A:
Q: Consider a snowpack of height 30.0 cm, temperature -5.0°C, and density of 420 kg/m'. Isothermal dens...
A: Given data, Height of snowpack, h = 0.3 m Temperature of the snow, Tsnow = -5 °C Density of snow, ρ...
Q: A 13 in pulley turns at 30 rpms find the constant of inverse variations
A: Write the formula for the constant of the inverse variations. Nd=k Here, k is the constant of the in...
Q: From a test on diesel engine that produces power in two full revolutions of the crank shaft, followi...
A:
Q: For sink temperature of 450 K, efficiency of Carnot engine is 30%. If sink temperature is reduced by...
A:
Q: Determine the maximum discharge obtainable in a 0.4 m diameter commercial ste that carries water fro...
A:
Q: Velocity field for uniform flow at an angle a with the X-axis can be written as V = (U cos a) i + (U...
A: given; V=(Ucosα)i+(Usinα)j
Q: AMPO 250 - 150 50 TiME
A: It is required to determine stress amplitude and stress ratio
Q: a) The Closed-loop Transfer function. b) Characteristic equation. c) Type and Order of the system.
A: A) Closed Loop Transfer Function: Transfer Function = OutputInput=G(s)1+G(s)H(s)=324s(s+6)1+324s(s+6...
Q: During inelastic collision of two particles, which one of the following is conserved ? 1. total line...
A: Let us discuss about types of collisions and what quantities are conserved in them. In all types of ...
Q: 8 m -5m 4 m 5 m 5 m 15 m 500 N In connection with the above figure, as an Engineer you have to repla...
A:
Q: The barometer of a mountain hiker reads 930 mbars at the beginning of a hiking trip and 780 mbars at...
A: Given data, P1= 930 mbar P2= 780 mbar d= 1.2 kg/m³
Q: A bronze bar is fastened between a steel bar and aluminum bar as shown. Find the largest value of P ...
A:
Q: gas in a piston-cylinder assembly undergoes a process for which the relationship between pressure an...
A: Given:PV2=CP1=9 barV1=2 m3P2=4 bar
Q: Water is to be supplied to the inhabitants of a college hoste through a supply main. The following d...
A: Given:L=4000 mn=3000Water consumed per day, q=180 Lhl=18 mf=0.007t=8 hrs
Q: 3. (20 pts.) The basketball passed through the hoop even though it barely cleared the hands of the p...
A: Find the time and hight at point B Va = 10 ft/sec
Q: The power (in MW) of a full sized
A: Given; A test conducted on a 1/5 scale model of a francis turbine under a head ,h=2mVolumetric flow ...
Q: modulus of ln (2 +3 j)?
A:
Q: QUESTION 5 LA local firm is planning its workforce and production levels over the next year. The fir...
A: Solution: Prepare the table as shown below: Month Number of Working days Demand Forecasting Units...
Q: What will be the length of given mild steel rod after applying 100 kips force/load ?. If the diamete...
A:
Q: Determine the internal normal force, shear force, and bending moment at point C in the beam. 300 lb/...
A: Given Data: Length of the beam, L=9 ft The magnitude of load, w=300 lb/ft
Q: A rotational spring-mass system is shown to the right. The slender rigid bar nas a mass of 18 kg and...
A: Springs generally deform under an applied force. This deformation is a function of nature of force. ...
Q: Question 1: For the following truss structure (with members AB, BC, AD, DE, BE, CF and FG all of 60 ...
A:
Q: Determine the reactions and forces (internal loadings) for points A, B, C, D and E as shown in the f...
A: FBD of the system, Uniformly variable load along AB is converted to point load which acts at point ...
Q: The stroke and cylinder diameter of a compression ignition engine are 250 mm and 150 mm respectively...
A:
Q: Assuming the end of C is moved 10mm downward by a load P on the beam, determine the normal strain de...
A:
Q: A closed system of mass of 2 kg undergoes a process during which there is energy transfer by work fr...
A:
Q: 4. You have three blocks of different dimensions b2(400mmx3000mm), b3(400mmx4000mm). Compute the str...
A:
Q: Cantilever steel shaft is loaded by concentrated couples. M1 M2 OM3 d Given: 14-21; 1z=1,21; 13=1,51...
A:
Q: MIXING PROBLEM CONDITIONS: 1.) When start P.B (10.0) is pressed, Pump Motor No. 1 (Q0.0) is ON. 2.) ...
A: Here the diagram given is as follows For the motor and pump time on delay and the level sensor are g...
Q: Humidity ratio of the air is?
A: Need to find humidity ratio of air.
Q: 3,600° The instantaneous angular velocity of the crank Q2A is counterclockwise. Q2A = 1.5 in. Find t...
A:
Step by step
Solved in 3 steps
- 1.19 A cryogenic fluid is stored in a 0.3-m-diameter spherical container is still air. If the convection heat transfer coefficient between the outer surface of the container and the air is 6.8 , the temperature of the air is 27°C, and the temperature of the surface of the sphere is –183°C, determine the rate of heat transfer by convection.3.16 A large, 2.54-cm.-thick copper plate is placed between two air streams. The heat transfer coefficient on one side is and on the other side is . If the temperature of both streams is suddenly changed from 38°C to 93°C, determine how long it takes for the copper plate to reach a temperature of 82°C.Show that the rate of heat conduction per unit length through a long, hollow cylinder of inner radius ri and outer radius ro, made of a material whose thermal conductivity varies linearly with temperature, is given by qkL=TiTo(rori)/kmA where Ti = temperature at the inner surface To = temperature at the outer surface A=2(rori)/ln(ro/ri)km=ko[1+k(Ti+To)/2]L=lenthofcyclinder
- A steam pipe 200 mm in diameter passes through a large basement room. The temperature of the pipe wall is 500C, while that of the ambient air in the room is 20C. Determine the heat transfer rate by convection and radiation per unit length of steam pipe if the emissivity of the pipe surface is 0.8 and the natural convection heat transfer coefficient has been determined to be 10 W/m2K.A pipe carrying superheated steam in a basement at 10C has a surface temperature of 150C. Heat loss from the pipe occurs by radiation (=0.6) and natural convection (hc=25W/m2K). Determine the percentage of the total heat loss by these two mechanisms.Using Table 1.4 as a guide, prepare a similar table showing the orders of magnitude of the thermal resistances of a unit area for convection between a surface and various fluids.
- 1.29 A spherical interplanetary probe with a 30-cm diameter contains electronic equipment that dissipates 100 W. If the probe surface has an emissivity of 0.8, what is its surface temperature in outer space? State your assumptions in the calculations.2.38 The addition of aluminum fins has been suggested to increase the rate of heat dissipation from one side of an electronic device 1 m wide and 1 m tall. The fins are to be rectangular in cross section, 2.5 cm long and 0.25 cm thick, as shown in the figure. There are to be 100 fins per meter. The convection heat transfer coefficient, both for the wall and the fins, is estimated to be K. With this information determine the percent increase in the rate of heat transfer of the finned wall compared to the bare wall.The interior wall of a large, commercial walk-in type meat freezer is covered under normal operating conditions with a 2-cm thick layer of ice. One day, a power outage cuts electricity to the refrigeration system of the freezer. Estimate the time required to melt this layer of ice if it has a mass density of 700kg/m3 and a latent heat of fusion of 334 kJ/kg. Consider the air temperature inside the freezer to be 20C with a heat transfer coefficient of 2W/m2K for convection from the freezer surface to air, and clearly state the assumptions made in your calculations.
- 1.76 Explain a fundamental characteristic that differentiates conduction from convection and radiation.A high-speed computer is located in a temperature-controlled room at 26C. When the machine is operating, its internal heat generation rate is estimated to be 800 W. The external surface temperature of the computer is to be maintained below 85C. The heat transfer coefficient for the surface of the computer is estimated to be 10W/m2K. What surface area would be necessary to assure safe operation of this machine? Comment on ways to reduce this area.3.17 A 1.4-kg aluminum household iron has a 500-W heating element. The surface area is . The ambient temperature is 21°C, and the surface heat transfer coefficient is . How long after the iron is plugged in does its temperature reach 104°C?