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The surface temperature of a 100 W incandescent lightbulb is 60.0°C. The surface temperature of a 20.0 W fluorescent tube producing the same amount of light as the 100 W incandescent lightbulb is 30.0°C. Determine the steady state irreversibility rate of each light source when the local environmental temperature is 20.0°C, and comment on which is the more efficient.
if the coefficient of rolling resistance of a cylinder on a flat surface is 0.5inch at what inclination of the surface
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Important information about Overall Heat Transfer Coefficient A copper sphere of internal diameter 2 m and wall thickness 40 mm is insulated with 75 mm of expanded polystyrene
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a hunter aims directly at a target 140 meter away. if the bullet leaves the gun ay a speed of 280 m/s, by how much will the bullets miss the target?
a barometer is used to measure atmospheric pressure contains mercury with a density of 13590 kgm3. if the local
the total cross-sectional area of the inlet to the jet engines is 20 ft2. assume that the flow properties of the air
For the pendulum shown in the figure,the restoring torque due to gravity is given by T=mgLsin(thita). Derive the linearised equation about the operation point thita=0.
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