A magnifying glass produces a virtual image
Indicate whether the statement is true or false
TRUE
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Calculate the water side heat transfer coefficient and the coolant pressure drop per unit length of tube for the core of a compact air-to-water intercooler for a 3.7 MW gas turbine plant. The water flows inside of a flattened aluminum tube having the cross- section shown belowThe inside diameter of the tube before it was flattened was 1.23 cm with a wall thickness (t) of 0.025 cm. The water enters the tube at 15.6°C and leaves at 26.7°C at a velocity of 1.34 m/s.
GIVEN
Water flow in a flattened tube as shown above
Inlet temperature (Ti) = 15.6°C
Outlet temperature (To) = 26.7°C
Water velocity (V) = 1.34 m/s
FIND
(a) The heat transfer coefficient on the inside of the tubes hc
(b) The pressure drop per unit length (?p/L)
ASSUMPTIONS
Steady state
Fully developed flow
PROPERTIES AND CONSTANTS
From Appendix 2, Table 13, for water at the average temperature of 21.1°C
A piece of glass that appears red
A) absorbs or reflects all colors except red. B) transmits red. C) both of these D) neither of these
Imagine yourself in a universe that is exhibiting a blue shift. This must mean:
it's expanding much faster than our Universe. it's expanding, but in a jerky fashion. it's collapsing. it's in a steady state, neither expanding nor collapsing. there's no such thing as a blue shift of light waves.
Consider a uniform hoop of radius R and mass M rolling without slipping. Which is larger, its translational kinetic energy or its rotational kinetic energy?
A) Translational kinetic energy is larger. B) Rotational kinetic energy is larger. C) Both are equal. D) You need to know the speed of the hoop to tell.