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1. What is a heat-affected zone? Why do some welding processes result in a joint where the material in the heat-affected zone is weaker than the base metal?
2. What welding techniques can be used to avoid loss of strength in the material in the heat-affected zone? Explain why these techniques are effective.
a hole in an aluminum roof panel is 2.748 cm2 in area at 0.000degc. what is the magnitude of the change to its area
a stainless steel tube of 1 cm outer diameter and 1mm wall thickness receives a uniform radiative heat flux of 100 wcm2
Determine the maximum angle () for which the wheelbarrow will not slip. (b) Repeat if the wheelbarrow faces uphill. Neglect all friction associated with the front wheel B.
The bent rod ABDE is supported by ball-and- socket joint at A and E and by the cable DF. If a 600-N load is applied at C as shown , determine the tension in the cable.
An electronics company has a contract to deliver
An equimolar mixture of helium and argon gases is to be used as the working fluid in a closed-loop gas-turbine cycle. The mixture enters the turbine at 2.5 MPa and 1300 K and expands isentropically to a pressure of 200 kPa. Determine the work outp..
An inventor claims to have made an engine that operates from a plutonium energy source at 1060°R and a heat sink at 558°R. He also claims that the engine produces 4.80 hp while rejecting 16000 Btu/hr of heat.
a vertical closed-loop geothermal heat pump is under consideration for a new 50000 ft2 school building in the area.
Derive the differential equations that describe the motion of the system. Express the system in state space form with the displacement and velocity of both masses as the system outputs
a 2.5 inch diameter schedule 40 pipe subject to 5000 pounds axial compression and a bending moment of 2500 in lbs.
Given the enthalpy of formation for food waste to be -394.7 MJ/kmol, use the combustion reaction from Equation 4.11 to calculate its HHV (assume that the molecular formula is the same as switchgrass). Repeat this calculation for redwood (assume an..
A 3/8-24 UNF nut and bolt (3/8 in nominal diameter, 24 threads/in) are inserted through a hole in two stacked steel plates. They are tightened so the plates are clamped together with a force of 1000 lb.
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