A 1000 m³ cubic building (meaning it is a cube with sides of length 10.0 m) has concrete walls 20 cm thick. Concrete has a thermal conductivity of 1.25 W/(mK). An indoor temperature of 21 C is maintained. If it is -15 C outside determine the rate of heat loss from the building. Answer: ✓ Choose... W
Q: 3.5 ft 30° A -211- -20-20- B 3 ft
A:
Q: Problem 1 100°C. - 10 kg of water is contained in a rigid 1 m³ container. It is heated from 20°C to…
A:
Q: Using Matlab, what are the step response curves of the closed-loop system, as shown in fig.1. the…
A: Given: To find: Step response
Q: Draw isometric view
A:
Q: determine the temperature distribution and wing efficiency throughout the wing taking into account…
A:
Q: Calculate the range for the stress of the load measures 100 lbs. and the load cell used has an error…
A: Calculated the range of stress of the load .
Q: An axial-flow pump is designed to deliver water at a rate of 0.90 m3/s running at 620 rpm. Determine…
A: Given:Water flow rate, Q=0.90 m3/sPummp speed, N=620 rpmPump maximum efficiency, η=75%At maximum…
Q: 2. Design a cam turning counterclockwise, to give a reciprocating follower move vertically the…
A: It is asked to draw the cam profile based on the following details. Rise = 8 cm SHM -150 Dwell - 45…
Q: The disk with radius r is rolling (without slipping) with angular velocity through the bottom of the…
A: Given data:- angular velocity (ω)= 2 rad/sec, R = 0.5 m, r = 0.2 m, the mass of the disk= 3 kg, To…
Q: Match the process, positions, and parts of an internal combustion engine using the figure.
A: For given diagram followings are the notation, A- Exhaust valve B- Intake valve C-Intake stroke…
Q: When 0.001 9 m³/s of water flow in a 76 mm pipeline at 21°C, is the flow laminar or lent?
A: Disclaimer: “Since you have asked multiple questions, we will solve the first question for you. If…
Q: Explain that the influence of the canard configuration on the stability derivatives.
A: Solution: Given Data: Explain that the influence of the canard configuration on the stability…
Q: Locate the centrod.) of the shaded are Express your answers using three significant figures…
A:
Q: Waste Heat Recovery (WHR) is a process to transform waste heat into useful work. This can be applied…
A:
Q: The Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the…
A:
Q: Question 1: The engineering team at Grainger company designed a shell-and-tube water-to-water heat…
A:
Q: Otto Cycle 1. Why are high compression ratios not used in spark ignition engines? 2. How does the…
A:
Q: - A (50 kg) mass is hanging from a spring of stiffness (5 *10ª N/m). A harmonic force has magnitude…
A:
Q: 1. A frictionless gear train is shown in the figure. What is the train value? 12 Teeth T=100 N-m 48…
A: Given Data- a gear train gave we have to find train value T1=12 T2=48 T3=12 T4=60
Q: The rod AB with mass m and length 7 has light rollers at ends. The rod moves along the smooth…
A:
Q: A Carnot cycle takes in 108 kW of heat from a high-temperature reservoir at 500 C. At what rate is…
A:
Q: Helium (R=2.08 kJ/kg-K and cv=3.12 kJ/kg-K) is compressed isentropically from a pressure of 110…
A:
Q: A room contains air at 85°F and 13 psia at a relative humidity of 60 percent. Use data from the…
A: Given: Tdb=85oF P=13 psia ϕ=60%
Q: how did you get 4.905? fy= mat -W+O = mat -(mg) + O = m (rα) -4.905 + O = 0.5 (0.25 x 16.82)…
A:
Q: 7.17. When oil (kinematic viscosity 1 × 10-4 m²/s, specific gravity 0.92) flows at a mean veloeity…
A:
Q: At a party, a parent is blowing up a birthday balloon until its diameter is n = 3.4 times the…
A: Introduction In this problem, we will compute the normal stress in the balloon after inflation, for…
Q: A cooling tower of a centralized air conditioning system handles 5,000 m3/h of water which enters…
A:
Q: An electric motor operates at 600 rpm and displaces a piston of a hydraulic pump by 200 cm³ per…
A:
Q: The single tank system (Figure 1) has been modelled by the first order differential equation given…
A: Given: To find: Expression to show how the level in tank will vary
Q: A 50.0 kN shipping container, initially at rest, is being pulled with forces P1 = 20.0 kN and P2 =…
A: Given: To find: Location of normal force
Q: A slender bar with a length of 2 ft is pin-connected with a roller positioned on a smooth horizontal…
A: Given: L= 2 ft F= 13 lb W= 10 lb
Q: Determine the mass moment of inertia for the following objects: a thin disk, circular cylinder, and…
A:
Q: A compression member of 6.5-m effective length is made by welding together two L152 x 102 × 12.7…
A:
Q: 1. Two metric spur gears are engaged; the gear ratio is 3/2 and they have a module of 2.5 mm. Find…
A:
Q: 7.8. If water (20°C or 68°F) flows at constant depth (i.e., uniformly) in a wide open channel, below…
A: This question is of heat transfer. The solution is given below.
Q: A vessel of water containing 300 kg of water is initially at 270 K. A 100 kg piece of metal,…
A: Mass of water= 300 kg water is initially =270 K. Mass of metal=100 kg metal initially = 1300 K The…
Q: 1.1 s) The overall size of the system (i.e. the shell) is 5.8 inch ID and a 27-inch long tube…
A:
Q: In order to calculate the maximum stress at a crack tip for an interior crack, a is equal to Blank 1…
A: Given: In order to calculate the amximum stress at a crack tip for an interior crack, a is equal to…
Q: QUESTION 4 Determine the force due to drag on an automobile traveling at 70 miles per hour. Assume…
A:
Q: Air is compressed in a compressor through the purely polytropic, purely isothermal, and intercooling…
A: The process that is purely polytropic is 1-X-2" Answer: C. 1-X-2"
Q: The hammer consists of a cast iron head and wood handle. The iron head has 7000 kg/m density, and…
A:
Q: The Kelvin-Planck and Clausius statements of thermodynamics are equivalent. In order to prove the…
A:
Q: Work Example 8.1 on page 390 of your textbook, but replacing the book values with the following…
A:
Q: A metal axle with second moment of area of 3,313.5 mm and radius of 15 mm is subjected to two…
A:
Q: Determine y, which locates the centroidal axis r' for the cross-sectional area of the T-beam, and…
A:
Q: A steel beam, of lengths a= 5 m and b= 3 m and a hollow box cross section, is supported by a hinge…
A: To find: The vertical support reaction at points A and B. Given: The length, a = 5 m. The length, b=…
Q: An aluminium rod fits inside a steel tube. The diametral clearance between the rod and the tube is…
A:
Q: 7.3. Carbon dioxide flows in a 50 mm pipe at a velocity of 1.5 m/s, temperature 66°C, and absolute…
A: given : d = 50 mm = 0.05 m V = 1.5 m/s T = 66oC = 339 K P = 380 kPa NOTE : ( standards) 1) gas…
Q: What is the function of the exhaust valve? Regulate the air-fuel ratio Filter air entering…
A: exhaust valve is located at top of the engine cylinder means in engine cylinder head. It is the…
Step by step
Solved in 2 steps with 2 images
- The thermal conductivity of fibreglass insulation at 67F is 0.02 Btu/h ft F. What is its value in SI units?1.22 m 1. To avoid overheating, natural convection analysis is to be considered. If the minimum allowable heat transfer due to natural convection is 30 W, find the maximum angle at which the TV can hang off the wall (0 < 0 < 60). Some temperatures were collected; Back panel surface: 45 °C, ambient: 32 °C. A typical 55-inch TV screen measures (122 cm x 69 cm). Note: A typical screen uses a portion of the incoming energy to light up the LED panel, while the rest is dissipated as natural heat convection. 0.69 mCompletely solve and box the final answer. Write legibly 1. How much heat will be transferred in KW if a hot gas at 175ºC crosses a wall 100-mm thick and cross-sectional dimensions of 25 cm x 52 cm. It leaves the wall at 52ºC. The thermal conductivity of the wall is 12.4 W/m-ºK?
- Q1: If a calorimeter is not assumed to be adiabatic, how would one calculate the heat transfer? Guide Questions: What are the parameters to be considered and the equations to be used? What law of thermodynamics does this transfer of heat to the surroundings touch? Is an adiabatic system automatically considered as a closed system? Please help me understand by also attaching a reference/book/journal article. This would help me in my essay. Thank you.Conduction Heat Transfer X material (a) material (b) . both (a) and (b) have the same thermal conductivity the temperature distribution is independent of thermal conductivity it's not that simple 9. Fin efficiency is defined as: • tanh (mL) (hP/k Ac)1/2 (heat transfer with fin) / (heat transfer without fin) (actual heat transfer through fin) / (heat transfer assuming all fin is at T = Tb) (Tx=L-Tf)/(Tb-Tf) 10. For an infinite fin, the temperature distribution is given by: (T-Tf)/(Tb-Tf)= e-mx. The heat flow through the fin is therefore given by: k (Tb-Tf)/L ● zero, because the fin is infinite ● infinite because the fin is infinite ● (Tb-Tf) (hP/k Ac)1/2 ● (Tb – Tf) (h P / k Ac)1/2 tanh (mL) 11. The Biot number, Bi, is defined as: • Bi=hk/L • Bi=hL/k • Bi= k/LH • Bi=qL/k • Bi=p UL/k 12. For a plate of length L, thickness, t, and width, W, subjected to convection on the two faces of area L x W. What is the correct length scale for use in the Biot number? . L ● W ● t • t/2 • L/2 13. If Bi…Jes 1:01 i docs.google.com/forms what is the Physicists recognize four fundamental forces.* Flectrical force O - Gravitational force -Strong nuclear force Weak nuclear force O -Muscular force Force of friction Ff is described by • Ff = µN * O p synovlal fluld in the Joints P -coefficient of fraction between two surface in The temperature of the human body is normally about 98.6°F.calculate the temperature of the body "C* oC = (5/9)x(oF-32) =5/9(98.6- 32)-37 oc oc=(9/5)x(of -32) =9/5(98,6-32) =13,3 Under resting conditions the body energy is being used as follows * O 27% by the liver and splee O 20-%by the skeletal musules Under resting conditions the body energy is being used as follows. O 19% by the brain. 15% by the kidney. We can write the first law of thermodynamics as: * O AU-AQ -A.. O AU-AQ +AW. 1kcal = J O 1 Kcal =4184j. O O O O
- A house, for cooling purposes, consists of two zones: the attic area zone A and the living area zone B (see below figure). The living area is cooled by a 2-ton air conditioning unit that removes °F per thousand Btu. The time constant for heat 19 4 41,000 Btu/hr. The heat capacity of zone B is transfer between zone A and the outside is 2 hr, between zone B and the outside is 4 hr, and between the two zones is 4 hr. If the outside temperature stays at 90°F, how warm does it eventually get in the attic zone A? It eventually gets to be F in the attic zone A. (Type an integer or decimal rounded to the nearest hundredth as needed.) 4 hr 쉽 A H 4 hr B 2 hr MIN 41,000 Btu/hrAn office space of 12 ft x12 ft x10 ft height. The heat loss through roof is (4780.8 Btuh) if Tb.l.=80 F, To= 5 F, and Uroof=D0.4 Btu/hr.ft2.F * O True O False1.7 Calculate the net rate of energy exchange by thermal radiation in a system consisting of two large parallel plane surfaces 1 and 2 with a surface area of A = 4 m? each, temperatures T, of 550 K and T, of 430 K, and emissivi- ties & of 0.3 and E, of 0.8. Assume that the distance between the two plane surfaces is small compared to their dimensions.
- Half a liter of liquid is being heated in a closed container to prepare food. Initial temp is 25C and desired temperature is 85C. How much energy is needed to raise the temperature of this amount of water as described? Specific heat of water is given as 4.18 kJ/(kg.K)In a concentrated solar power plant, molten salt tank is used to store the thermal energy from the sun during the day. The tank wall thickness is 3cm containing molten salt at a temperature of 390 degree Celsius. There is atmospheric air outside the tank at a temperature of 30 degree Celsius. Suppose heat is lost as a result of heat transfer from the molten salt to the atmospheric air. What is the mode of heat transfer in this condition? conduction then convection convection then conduction convection then conduction then convection conduction then convection then conductionAn air-cooled condenser has an expected U value of 30 W/m2∙K based on the airside. The condenser is to transfer 60 kW with an airflow rate of 15 kg/s entering at 35°C. If the condensing temperature is to be 48°C, what is the required airside area in m2? Round your answer to 2 decimal places. heat transfer