Engineering Problem Solver - Get Instant Explanations

A room is initially at the outdoor temperature of 25C. Now a large fan that consumes 200W of electricity when running is turned on. The heat transfer rate between the room and the outdoor air is given as Q = UA (Ti - To) where U = 6 W/m2 C is the overall heat transfer coefficient, A = 30 m2 is the exposed surface area of the room, and Ti and To are the indoor and outdoor air temperatures, respectively. Determine the indoor air temperature when steady operating conditions are established
1 Answer
4.68 steam enters a turbine in a vapor power plant operating at steady state at 560c, 80 bar, and exits as a saturated vapor at 8 kpa. the turbine operates adiabatically, and the power developed is 9.43 kw. the steam leaving the turbine enters a condenser heat exchanger, where it is condensed to saturated liquid at 8 kpa through heat transfer to cooling water passing through the condenser as a separate stream. the cooling water enters at 18c and exits at 36c with negligible change in pressure. ignoring kinetic and potential energy effects and stray heat transfer at the outer surface of the condenser, determine the mass flow rate of cooling water required, in kg/s.
1 Answer
Hw3/ the lab flume has dimensions 7 m length, 0. 4 m width, and 0. 8 m depth, the head of water over a gate is 0. 3 m. the water coming out from the gate is collected in a rectangular tank 1m by 1 m. the rise of the water level in this tank is 90 cm in 15 sec. find the coefficient of discharge. if the height opening is 0. 1 m
1 Answer
5. which of these least accurately describes what happens when abnormal combustion raises the temperature and pressure inside the combustion chamber?a. pingob. spark knockc. detonationd. vapor lock
1 Answer
Water flows out of a reservoir, through a penstock, and then through a turbine. The mean velocity is 5. 3 m/s. The friction factor is 0. 2. The total penstock length is 30 m and the diameter is 0. 3 m. There are three minor loss coefficients: 0. 5 for the penstock entrance, 0. 5 for the bends in the penstock, and 1. 0 for the exit. Calculate the total head loss in units of meters
1 Answer
If i can read the signs on the right it could mean im either on a on way or a two way street DRIVINGTRUE OR FALSE
1 Answer
Construct 2 input XOR logic gate using the PIC16F818. Make own assumptions and give a code
1 Answer
The output from the differential pressure sensor used with an orificeplate for themeasurement ollowrate Is non-linear, the outputVoltagebeing proportional to the square of the flow rate. Determine the form ofcharacteristic required for the element in the feedback loop of an operationalamplifier signal conditioner circuit in order to linearise this output.
2 Answers
What is the application of dimensional analysis in medicine and dentistry
1 Answer
Q3. (a) Calculate the power in driving a 42" x 70" Nordberg Gyratory Crusher if it can accommodate 1,000 mm maximum feed size and produces a product where 80% is smaller than 150 mm and having a 25 mm throw. The design throughput is 1,200 tph of stones and aggregates (dry)
1 Answer
One hundred kilograms of an aqueous solution of p-chlorophenol at a concentration of 1 g per kgwater is to be treated with 2 kg of an adsorbent to recover the compound from the solution by a twostage crosscurrent contact. calculate the maximum percentage recovery of the solute if theequilibrium relation at the operating temperature of 298k is given by: = . where x = kg solute (p-chlorophenol) per 1000 kg water and y = kg solute per kg adsorbent
1 Answer
Urethane (k = 0.026 w/m.k) is used to insulate the side wall and the top and the bottom ofa cylindrical hot water tank. the insulation is 40 mm thick and is sandwiched betweensheet metal of thin wall construction. the height and inside diameter of the tank are 2 mand 0.80 m, respectively and the tank is in ambient air for which t[infinity] = 10 c and h = 10w/m2k. if the hot water maintains the inner surface at 55 c determine the total heat lossfrom the water to ambient air.
1 Answer
1b. what are equipment requirements for windshields and side windows?
1 Answer
2- given the velocity field ; u = y2-x2 , v = 2xy sketch the field, find the velocity and acceleration components at point (2,2) and (2,-2).
1 Answer
This question has been set up with several idealizations, including x = 0, andF in the x direction. Are these reasonable, could you solve for these stresses withoutthese assumptions? Discuss briefly
1 Answer
A biomedical transducer can be represented by a series RLC circuit with a 100 ohm resistors and unknown capacitor and inductor. Analysis of the transducer in the lab indicated that the damping coefficient is 0. 4 and natural resonance frequency is 159 Hz. Determine the values for the capacitive and the inductive components. Discuss the way to increase the damping coefficient to 0. 707 without affecting the natural resonance frequency
1 Answer
The Sun was formed from a large cloud of gas. What caused this gas to come together and form the Sun? A. The atoms of gas were pulled together by the force of gravity. B. The planets pushed the atoms of gas toward each other. C. The magnetic forces from stars moved the atoms of gas together. D. The atoms of gas were attracted to the center of a black hole.
1 Answer
In this exercise, we examine the effect of the interconnection network topology on the clock cycles per instruction (CPI) of programs running on a 64-processor distributed-memory multiprocessor. The processor clock rate is 3. 3 GHz and the base CPI of an application with all references hitting in the cache is 0. 5. Assume that 0. 2% of the instructions involve a remote communication reference. The cost of a remote communication reference is (100 + 10h) ns, where h is the number of communication network hops that a remote reference has to make to the remote processor memory and back. Assume that all communication links are bidirectional. a. Calculate the worst-case remote communication cost when the 64 processors are arranged as a ring, as an 8x8 processor grid, or as a hypercube. (Hint: The longest communication path on a 2n hypercube has n links. )b. Compare the base CPI of the application with no remote communication to the CPI achieved with each of the three topologies in part (a). c. How much faster is the application with no remote communication compared to its performance with remote communication on each of the three topologies in part (a)
1 Answer
A structural plate component of an engineering design must support 207 MPa in tension. If the aluminum alloy is used for this application,what is the largest internal flaw size that this material can support?Assume the shape factor is 1 and that for aluminum KIC=25. 6 MPa/m and yield strength is 455 MPa
1 Answer
World Builder is responsible for designing and developing compelling environments using _____ and unique assets. Terrain editorsCADPhotoshopBlender
1 Answer
Easily find HTML color codes for your website using our color picker, color chart and HTML color names with Hex color codes, RGB and HSL values.
1 Answer
A municipal wastewater treatment plant employs two circular primary clarifiers arranged in parallel, following the bar screen and grit removal chamber. The plant receives 5. 0 MGD. Each clarifier is center-fed (water enters at the center and exits at the perimeter). The clarifier radius is 43. 0 ft, and depth is 10. 0 ft. (a) What is the detention time in each clarifier
1 Answer
N 1A sound measurement element has an input pressure range of P = 1 Pa to P = 1000 Pa. The output of the element (milli-volts) is measured under standard conditions and the following calibration function is obtained. V(P) = 21 + 2000 / P (a) Write down the ideal linear response equation
1 Answer
Write a Java program with four classes to calculate the intersection area of two circles when r1-r2 d r1+r2 is satisfied
1 Answer