Answer: It takes the form of heat or thermal power.
Explanation: I got it right on the test.
Answer:
Explanation:
Given
Take off speed
distance traveled in runway
using motion of equation
where v=final velocity
u=initial velocity
a=acceleration
s=displacement
Acceleration after take off
time taken to reach
after take off it take time to reach
total time taken
Answer:
The four basic families of shape production processes are:
(1) Casting, (2) Material removal, (3) Deformation processes, and (4) Consolidation
processes.
1. Casting processes can produce extremely complex shapes, but may have defects related to shrinkage and porosity.
2. Material removal processes can have outstanding precision, but generate scrap as the material is cut away.
3. Deformation processes can offer high rates of production, but require powerful equipment and
dedicated tools or dies.
4. Consolidation processes can produce large or complex shapes, but the joints may possess properties that are different from the base material.
Answer:
The final temperature is 26.96 F
Explanation:
Initial pressure = 30 lbf/in^2 = 30×1.01325/14.696 = 2.1 bar
Initial temperature = 20 F = (20 - 32)/1.8 + 273 = 266.33 K
From steam table, entropy at 2.1 bar = 7.111 kJ/kg.K
Initial enthalpy = 7.111×266.33 = 1893.9 kJ/kg
Final pressure = 60 lbf/in^2 = 60×1.01325/14.696 = 4.1 bar
From steam table, entropy at 4.1 bar = 6.889 kJ/kg.K
Work = 0.5 Btu = 0.5×1.05506 = 0.5908 kJ
Change in enthalpy (∆H) = work/mass
mass of refrigerant = 0.04 lb = 0.04×0.45359 = 0.0181 kg
∆H = 0.5908/0.0181 = 32.64 kJ/kg
H2 = H1 - ∆H = 1893.9 - 32.64 = 1861.26 kJ/kg
Final temperature = final enthalpy ÷ final entropy = 1861.26 kJ/kg ÷ 6.889 kJ/kg.K = 270.2 K = 1.8(270.2 - 273) + 32 = -5.04 + 32 = 26.96 F