Identify the correct statement. Give explanation also
Q: Compute the final velocities v,'and v,' after collision of the two cylinders which slide on the smoo...
A: Given data e=0.59 V1=45 ft/sec V2=7 ft/sec W1=5lb W2=12lb We have determine final velocity
Q: Discuss the origin of the SI and English units.
A: The international system of units abbreviated SI is the modern metric system of measurement. It was ...
Q: A pipe is used for energy transmission. Length and diameter of pipe are 80 m and 45 cm respectively....
A: Friction pressure loss, measured in metres, dissipates the energy necessary to force water through a...
Q: The noise level in a factory with 12 identical machines running is 80 dB. At night, the factory must...
A: Given data: Number of identical machines running = 2Overall sound level = 80 dBRegulation noise leve...
Q: Gaseous nitrogen actuates a Carnot power cycle in which the volume at the beginning of the isotherma...
A:
Q: Problem 1A steel wire is 6 m long,, hanging vertically supports a load of 2000N. Neglecting the weig...
A:
Q: If 10 kg/min of air are compressed isothermally from P1=96kPa and V1=7.65m^3/min to P3=620kPa, find ...
A:
Q: Essay about familiarization on machine
A: Machine familiarization is nothing but giving the required knowledge or information about the featur...
Q: REFRIGERATION In a freon-22 refrigeration system, the capacity is 20 tons at a temperature of -20...
A:
Q: Problem 4 (a) Water from a water reservoir is delivered through a 2-cm pipe to a 200-litre tank as s...
A:
Q: Given data Mass-18 kg Velocity=3 m/s
A: Givenmass of the object m=18kgvelocity of the object V=3m/s
Q: n air-standard Carnot cycle operates between temperatures of 80 deg F and 1472 deg F. The minimum pr...
A: Carnot cycle is an imaginary cycle that gives the maximum possible efficiency between two temperatur...
Q: 4. Figure 3 below shows a flat plate with the pressure distribution and shear stress given. b = widt...
A:
Q: D Ar 1 m 2.5 m B 8 m
A: Given
Q: Calculate the y-coordinate of the centroid of the shaded area. The triangle is equilateral
A:
Q: An engine that operates at half its theoretical (Carnot) efficiency operates between 525° C and 280°...
A: GIVEN DATA- LOWER TEMPRATURE =280'C = 280+273=553K HIGHER TEMPRATURE =525'C=525+273=798K W=850KW WE ...
Q: A graphene sheet with thickness t= 150 nm and u= 0.185 is subjected to a nanoindentation test. Based...
A: thcikness (t) =150 nm and poison's ratio (ν) = 0.185 poison' ratio (ν)= 0.25 young's modulus (Ei )=...
Q: Gaseous nitrogen actuates a Carnot power cycle in which the volume at the beginning of the isotherma...
A:
Q: quations for the circumferential and lo
A:
Q: Two blocks A and B of the same mass 0.92 kg are released from rest on a 29° incline when they are S ...
A:
Q: Find kinematic viscosity of a liquid in stokes whose specific gravity is 0.95 and dynamic viscosity ...
A:
Q: 8–5. The ladder has a uniform weight of 80 lb and rests against the smooth wall at B. If the coeffic...
A: We are authorized to answer one question at a time since you have not mentioned which question you a...
Q: The fuel assembly shown in the left figure consists of periodic arrays of annular bare fuel rods, wh...
A: NA
Q: The column is subjected to an axial force of 8 kN which is applied through the centroid of the cross...
A:
Q: Problem 11. The problem below, consists of a rod with a circular cross-section embedded and bonded i...
A: (a) If the wall is replaced by spring, Material has length 'L' and radius 'R' elasticity ε Young's ...
Q: The structure is used to support a distributed load of w = 5 kN/m. The bolts at A, B, and C each hav...
A:
Q: A hollow aluminum rod has a max shear stress of 0.075 GPa. What is the maximum torque that can be ap...
A:
Q: 6. Starting from a point P, a car travels 20 km due east and then travels in the direction N50°W unt...
A:
Q: TRP TUNELE HA PEN TM AutoSave On Hwk-6a MechanialProperties-ElasticRegion Last Modified: Mon at 9.05...
A: Explaining the difference between tension and compression and also formulating the mathematical expr...
Q: A 5-m-long simply supported timber beam carries two concentrated loads as shown. If L = 8 kN and M =...
A: Given data: L=8 kNM=52 kNL= 5 m Need to determine the magnitude of the vertical reaction at point D.
Q: 1l support a moment o stress What is that
A: given moment M=150Nm
Q: A ordinary vapor-compression refrigeration using R-134A operates with a condenser tem- perature of -...
A: The vapor compression refrigeration cycle consists of four processes: Isentropic compression, Const...
Q: In a nuclear power plant heat is transferred in the nuclear reactor to liquid sodium. The liquid sod...
A: Pump 1: Wp1 = 0.001008( 400 - 7.5 ) = 0.4 kJ/kg h2 = h1 + Wp1 = 168.8 + 0.4 = 169.2 kJ/kg Pump 2...
Q: A product having a moisture content of 70% (wet basis) is dried in a tunnel-type dryer at a rate of ...
A: Write the given data in the problem. xi=70%m˙A=1000 kg/hrm˙P=30 kg/hr Q1=5% Q2=40% Here, xi is th...
Q: A sound source has a sound power of 20 Watts propagating uniformly into free field. Determine the so...
A:
Q: If an undamped spring-mass system with a mass that weighs 5N and a spring constant 2 N/m s suddenly ...
A:
Q: is moving with ULAO WI
A:
Q: A tennis ball is projected toward a smooth surface with speed v as shown. Determine the rebound angl...
A:
Q: Cars A and B are traveling in adjacent highway lanes and at t = 0s have the position and velocity sh...
A:
Q: 2. A 0.10 cm-radius sphere falling in air (T= 20°C) at a speed of 25 m/s. Determine the following: ...
A:
Q: A lunar excursion module (LEM) weighs 1500 kg on earth where g=9.75 mps2 Calculate Match each item t...
A:
Q: A bucket is hanging from a horizontally moving crane. Calculate the maximum allowable speed (m/s) of...
A: L=8.25m θ=30.8o
Q: The following are the details of an offset slider mechanism: • Link 2 which is on the left side of t...
A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...
Q: A1 kg block B is moving with a speed of 2.62 m/s as it strikes the 0.47 kg sphere A which was at res...
A:
Q: The 1900-kg car has a velocity of 21 km/h up the 10-percent grade when the driver applies more power...
A:
Q: Locations where the V curve crosses the V= 0 axis are important because they indicate O where the ar...
A:
Q: 10-4 A PWR operates at 2000 psia and 600°F hot leg. It has a 1000 ft pressurizer which is normally h...
A:
Q: S. A fluid undergoes a reversible adiabatic compression from 0.5 MPa, 0.2m 0 m according to the law,...
A:
Q: What is the reading in the caliper as shown in the figure
A:
Q: A 1.58 kg block B is moving with a speed of 2.04 m/s as it strikes the 0.54 kg sphere A which was at...
A:
Identify the correct statement. Give explanation also.
Step by step
Solved in 2 steps with 2 images
- 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=lenthofcyclinder3.16 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.1.10 A heat flux meter at the outer (cold) wall of a concrete building indicates that the heat loss through a wall of 10-cm thickness is . If a thermocouple at the inner surface of the wall indicates a temperature of 22°C while another at the outer surface shows 6°C, calculate the thermal conductivity of the concrete and compare your result with the value in Appendix 2, Table 11.
- 2.44 To determine the thermal conductivity of a long, solid 2.5-cm-diameter rod, one half of the rod was inserted into a furnace while the other half was projecting into air at . After steady state had been reached, the temperatures at two points 7.6 cm apart were measured and found to be and , respectively. The heat transfer coefficient over the surface of the rod exposed to the air was estimated to be 22.7 . What is thermal conductivity of the rod?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?2.29 In a cylindrical fuel rod of a nuclear reactor, heat is generated internally according to the equation where = local rate of heat generation per unit volume at r = outside radius = rate of heat generation per unit volume at the centerline Calculate the temperature drop from the centerline to the surface for a 2.5-cm-diameter rod having a thermal conductivity of if the rate of heat removal from its surface is 1.6 .
- 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.An electronic device that internally generates 600 mW of heat has a maximum permissible operating temperature of 70C. It is to be cooled in 25C air by attaching aluminum fins with a total surface area of 12cm2. The convection heat transfer coefficient between the fins and the air is 20W/m2K. Estimate the operating temperature when the fins are attached in such a way that (a) there is a contact resistance of approximately 50 K/W between the surface of the device and the fin array and (b) there is no contact resistance (in this case, the construction of the device is more expensive). Comment on the design options.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.
- 1.79 Consider the cooling of (a) a personal computer with a separate CPU and (b) a laptop computer. The reliable functioning of these machines depends on their effective cooling. Identify and briefly explain all modes of heat transfer involved in the cooling process.A cooling system is to be designed for a food storage warehouse for keeping perishable foods cool prior to transportation to grocery stores. The warehouse has an effective surface area of 1860 m2 exposed to an ambient air temperature of 32C. The warehouse wall insulation (k=0.17W/(mK)) is 7.5 cm thick. Determine the rate at which heat must be removed (W) from the warehouse to maintain the food at 4C.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.