A flat cable cannot directly turn 90° sidewards. If a flat cable had to be turned 90° to the right and still allow forwards and
2 answers:
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Answer:
net force acting on the floor is 100 kN
Explanation:
Given data:
dimension of floor = 2 m \times 0.5 m
we know that
Net force can be calculated as follow
Therefore net force acting on the floor is 100 kN
Answer:
123.9 Btu
Explanation:
The energy balance on the air is:
∆E = E2 − E1 = ∆KE + ∆PE + ∆U = Q + W
ignore ∆KE and ∆PE,
W = ∆U − Q = m(u2 − u1) − Q; (u2 − u1 = 51.94 Btu/lb)
ideal gas properties is attached
W = (2 lb)(143.98 − 92.04) Btu/lb − (− 20 Btu) = 123.9 Btu
u2 − u1 ≈ cv(T2 − T1) = (0.173 Btu/lb°R)(840 − 540) °R = 51.9 Btu/lb
