If you lived on the Moon, you'd see full Earth when we see new Moon
Indicate whether the statement is true or false
TRUE
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Flue gases at 700ºC pass over a bank of superheater tubes at 6 m/s. The tube bank is composed of 20 columns of 2 cm diameter tubes with 40 tubes per column. The arrangement of the tubes is staggered as shown in the figure with ST = SD = 4.0 cm. Determine the pressure drop across the tube bundles, assuming that the tubes have an average surface temperature of 500ºC.
Conservation of Momentum: A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the momentum change during the collision is correct? (There could be more than one correct choice.)
A. The truck experiences the greater magnitude momentum change. B. The small car experiences the greater magnitude momentum change. C. The small car and the truck experience the same magnitude momentum change. D. The magnitude of the momentum change experienced by each one is inversely proportional to its mass. E. The magnitude of the momentum change experienced by each one is directly proportional to its mass.
A normal lapse rate of 2.7 °F/1000 ft is equivalent to
a. 3.5 °C/m. b. 1.5 °C/1000 ft. c. 5.0 °C/1000 ft. d. 6.5 °C/1000 ft.
What is the quark structure of an electron?
a. uud b. udd c. uuu d. ddd e. the question does not make sense