Answer:
Energy Transfer = 350 kJ
Explanation:
The net work can be derived from the energy balance equation. Thus, we have:
∆KE + ∆PE + ∆U = Q − W
Where
∆KE = ∆PE = 0 (Since there’s no notable change in either kinetic or potential energy of the steam)
Net work comprises the work done by the paddlewheel, Wpw,
and the work on the piston, Wpiston:
W = Wpw + Wpiston
From the data provided, Wpw = −18.5 kJ,
Summarizing results:
Wpw + Wpiston = Q − ∆U
Wpiston = Q − ∆U − Wpw = Q − m (u2 − u1) − Wpw
Where Q = 80 kJ, m = 5 kg, u2 = 2659.6 kJ/kg, and u1 = 2709.9 kJ/kg
= 80 kJ − 5 kg (2659.6 − 2709.9) kJ/kg − (−18.5 kJ)
= 350 kJ
An item of protective gear that shields individuals passing by from stray sparks or metal during the welding process performed by another worker is known as: E. Welding Screens.
An operator is a person tasked with joining two or more metals using a technique called wielding.
In the course of wielding, both sparks and tiny metallic fragments are released, which pose a danger to the operator and others working nearby.
As a result, the equipment outlined below should be worn or utilized directly by a worker actuating the wielding process:
Nonetheless, a type of protective gear that defends other workers nearby from stray sparks or metallic fragments while the operator (worker) is in the act of welding is called welding screens.
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Answer:
D.informing your passengers of your destination
