. A constant current of 1 ampere is measured flowing into the positive reference terminal of a pair of leads whose voltage we’ll
call vp. Calculate the absorbed power at t = 1 s if vp(t) equals (a) +1 V; (b) −1 V; (c) 2 + 5 cos(5t) V; (d) 4e−2t V, (e) Explain the significance of a negative value for absorbed power
1 answer:
Answer:
(a) 1W
(b) -1W
(c) 6.98W
(d) 0.541W
(e)Negative value of absorbed
power indicates that the object is
actually supplying power to some
other object. That is negative
absorbed power is equal to
positive supplied power.
Explanation:
Detailed explanation of all the parts of the question are given in attached files.
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Explanation:
Given:
v=800ft/s
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Air pressure = 20F
Compression pressure ratio = 8
temperature at turbine inlet = 2200F
Conversion:
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Air standard assumptions:
= 0.0240Btu/lbm.°R, R = 53.34ft.lbf/lbm.°R = 1717.5ft²/s².°R 0.0686Btu/lbm.°R
k= 1.4
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As enthalpy exerts more influence than the kinetic energy inside the engine, kinetic energy of the fluid inside the engine is negligible
hence
= 20+460 = 480°R
= 533.25°R
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=
= 14.45 psia
Answer:
62990.08 N/M
Explanation:
Circumferential stress, or hoop stress, a normal stress in the tangential (azimuth) direction. axial stress, a normal stress parallel to the axis of cylindrical symmetry. radial stress, a stress in directions coplanar with but perpendicular to the symmetry axis.
See attachment for the step by step solution of the given problem..
