The hot combustion gases of a furnace are separated from the ambient air and its surroundings, which are at 25 oC, by a brick wa

Answer:

Explanation:

The equilibrium vacancy concentration can be described by:

nv/N = exp(-ΔHv/KT),

where T is the temperature at which vacancies form,

K = Boltzmann's constant,

and ΔHv = enthalpy of vacancy formation.

Rearranging this equation to express temperature allows you to calculate it using the provided values. A detailed breakdown of the process is included in the attached file.

Answer:

Change in length = 0.0913 in

Explanation:

Given data:

Length = 6 ft

Diameter = 0.2 in

Load w = 200 lb/ft

Solution:

We start by applying the equilibrium moment about point C, expressed as

∑M(c) = 0.............1

This can be used to find the force in AB.

10× 200 × ( 5) - (T cos(30)) × 10 = 0

Solving gives us

Tension in wire T(AB) = 1154.7 lb

We also know the modulus of elasticity for A992 is

E = 29000 ksi

And the area will be

Area =

The change in length is expressed as

Change in length = .........2

Substituting values results in

Change in length =

Change in length = 0.0913 in

Answer: a) U2 = 164.737kJ/kg

b) Q2 = 22.6kJ

Explanation: see attachment below

The heat transfer rate to the surrounding air per meter of pipe length is quantified as 521.99 W/m. Given the negligible radiation losses from the pipe, convection remains the sole method of heat transfer. The rate of heat transfer via convection can be defined as such, using the specified heat transfer coefficient of 10.45 for air and calculating the surface area of the pipe.