Water hardening process of 2 m long and 0.05 m diameter steel bars will be carried out. The steel bar, which is heated up to 900 °C in the oven, is cooled to an average temperature of 100 °C in a water bath. The water bath is kept at a uniform temperature of 30 °C and the heat transfer coefficient between the water and the rod surface is 325 W/m2K. Accordingly, calculate the time required for the steel bar to cool to 100°C in the water bath. (Steel bar p=7832 kg/m3, cp=434 J/kgK, k=63.9 W/mK)

Q: A counter-flow double pipe heat exchanger is to heat water from 20 ⁰C to 80 ⁰C at a rate of 1.2 kgs-…

A: Heat exchanger  is a steady flow, adiabatic, open system and constant pressure device in which two…

Q: The two solid steel shafts shown in the figure are connected together using gear wheels. The length…

A: The torsion angle of the shaft  and the total rotation of the end .Given:The length of the shaft…

Q: The center of mass G of a high jumper follows the trajectory shown. Determine the component vo,…

A:

Q: A generating set is arranged on board ship with its axis parallel to the longitudinal centre-line of…

A: We know, Gyroscopic couple is given asGivenr=180mv=36km/hr=mass of revolving part, m=1400kgradius of…

Q: Ice at 0 ℃, the dimensions of which are given in the figure mass of stagnant air with a temperature…

A: please refer handwritten solution

Q: A probabilistic approach to address variability in mechanical properties of brittle materials can be…

A: Given:To find:Weibull modulus

Q: Consider an ideal gas inside a cylinder with a piston and weights at 200 kPa occupying a volume of…

A: At state 1:Pressure,P1=200kPaVolume,V1=0.04m3At state 2:Volume,V2=0.1m3To determine:Work done by the…

Q: explain in a structured way about the relationship between gibs free energy, enthalpy and entropy at…

A: Let's explore the relationship between these three thermodynamic quantities in a structured…

Q: The sliding glass door rolls on the two small lower wheels A and B. Under normal conditions the…

A:

Q: Air enters a refrigeration coil at 32°C db and 24°C wb at a rate of 40 m3/min. The apparatus dew…

A:

Q: The fire truck ladder is being raised at a constant rate of 8₂=0.5 rad/s. Simultaneously, it is…

A: Rotation speed about the x axis:And rotation about the vertical z axis:Extended rate of the…

Q: 1 kg of a gas at a temperature of 40° C and a pressure of 120 KPa occupies a volume of 0.25m3. If…

A:

Q: Two 20 × 100-mm and two 20 × 180-mm boards are glued together as shown to form a 120 × 200-mm box…

A: Show in Fig.Vertical shear, V = 3.625 kN   = 32533333.33 + 20160000

Q: (d) (Develop a model, in final integrated form, to estimate the concentration of species A exiting…

A: The wastewater that enters the tube and contains 10 g/m3 of benzene (solute A) dissolved in water is…

Q: So what is the answer? What is y (1)? What is the answer up to two decimal places.

A: y(1) for equation of motion

Q: Suppose that 48 J of work is needed to stretch a spring from its natural length of 8 m to a length…

A:

Q: 3.4 Specification of a laminar boundary layer profile as an inflow condition is often used in…

A: Flat plate laminar boundary layer U = dΨ/duv = dΦ/ dx

Q: 4. For the plenary gear, OB is spinning at 5 rad/s and A is fixed. Determine (A) the angular…

A:

Q: t₁ = t2 = i i sec, |v|= Mi sec, |v|= i ft/sec ft/sec

A:

Q: A 28-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the…

A:

Q: We want the wagon to reach a speed of v= 1 m/s in t=4 seconds. It will then shoot at constant speed.…

A: givenW=450 kgf=4414.5 Nm=(W/g) = (4414.5/9.81) = 450 N

Q: Determine the horizontal force that must be applied to the fifth block from the top of the stack, in…

A: Number of Block = 6Force acting on the block= 5NThe coefficient of static friction between the…

Q: The 40-kg cylinder is suspended from a clamping collar at C which can be positioned at any…

A:

Q: Find P₂ in the following pipe.

A: Given Data

Q: A metal composite wall consists of two outer metal skins (k = 100 W/m.k) 2 mm thick which  sandwich…

A: Given -                                              For a composite wall              thermal…

Q: A composite wall of a refrigerator consists of three different materials; A, B, and C. Two of the…

A:

Q: Consider the three masses A, B and C, respectively 1 kg, 1 kg and 5 kg, connected through the system…

A: Given data :-Mass of A = 1kgMass of B = 1kgMass of C = 5kgPulleys are massless and…

Q: For the system given in the figure on the right-hand side, where the input is four-unit step i.e., r…

A: givenAs per the Bartleby policy I am solving Part a, b, c and d.

Q: A rocket runs out of fuel in the position shown and continues in unpowered flight above the…

A: According to the given dataWe need to findMaximum height h gained by the rocket and time to reach a…

Q: Determine the range of weights W for which the 81-lb block is in equilibrium. All wheels and pulleys…

A:

Q: We would like to design a wagon system as below when filling coal into the furnace at the Coke…

A: givenW=390kgf=3824.59Nm=

Q: The posture of the input link 2 is RAO-120^i mm, and the velocity of point A is V₁ =25^i m/s.…

A: Given:To find:Angular velocity of link 3 and 4

Q: 3m B -3 m- 3 m C @ 2.25 m k = 200 N/m -3 m- D -4 m- M E F 3m 3m 3 m 3 m A 0-90° μ=0.1 -2m-1m- F(x)=…

A:

Q: 100 N 60⁰ c. 40 mm +P 40 mm --x 40 mm 1. the magnitude of the force P 2. the magnitude of the…

A: According to our guidelines , we are supposed to answer first three sub parts separately . Please…

Q: The rigid beam BC is supported by rods (1) and (2). The cross-sectional area of rod (1) is 11 mm².…

A:

Q: 400 mm Fr= 800 N 150mm -Ft= 600 N Fa = 4,00 L 450mm Draw bending torsional moments, shear forces and…

A: The force acting at gear C in negative y-direction , Fr = 800 NThe force acting at gear C in…

Q: For the following Identify the true and false sentences: Human body doesn't sense velocity except…

A: This question is based on the concept of Kinematics. As per the guidelines we are subjected to solve…

Q: Determine the maximum speed for each car if the normal acceleration is limited to 0.81g. The roadway…

A: given

Q: ****I hope that the solution is written on the computer and not written so that I can transfer it…

A:

Q: Determine the value of the damping coeffecient c for which the system is critically camped if k = 76…

A: Given data is

Q: A 30 kN/m 2.4 m C 50 kN 1.2 m D 1.2 m B Q4. Determine the deflection and slope at point C by using…

A: For solution please refer below images.

Q: A shaft given in the figure has four masses of 200 kg, 300 kg, 400 kg and 200 kg, respectively. and…

A: Consider the balancing masses in plane L as and in plane R as .Represent the position of planes and…

Q: Two forces are applied to an AISI 1050 HR post BD, as indicated. Knowing that the cross section of…

A: Cross-section of the vertical part, A = 1.5 in x 2.4 inThe yield strength for AISI 1014 HR steel, Sy…

Q: Problem 1 Approximately determine the forces in each member of the truss. Assume that the diagonal…

A: An ABCDEFGHA truss with a roller support at D and a hinged support at A.Check the truss member's…

Q: 1. The axle of the car is subjected to forces and moment shown, where the diameter of the axle is…

A: Let us consider the given data,The diameter of the solid axle is .The torque To Find:(i) The…

Q: A minivan is tested for acceleration and braking. In the street-start acceleration test, the elapsed…

A: Velocity before the starting of the braking:Final velocity after braking:Distance travelled during…

Q: The turnbuckle is tightened until the tension in cable AB, is T-3.2 kN. Calculate the magnitude of…

A: Tension in the cable AB is 3.2 kN Find the moment about the line OP

Q: An apartment has the dimensions 18 m by 9 m by 6 m. The temperature is 35°C, and the relative…

A: To find the total mass (in kg) of water vapor in the air in the apartment

Q: is compressed 2 04: 3 kg of air at 1.5 bar pressure and 77°C temperature at state polytropically to…

A:

Q: om the given figure shown below, determine the centroidal moment of Inertia (Ixo and lyo) of the…

A: From the figure, we can conclude that all the values are in inches.

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.