The condition for onset of turbulent flow is that the Reynolds Number reaches what value?
a. 1 000
b. 2 000
c. 3 000
d. 4 000
c
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Capacitance is o A/d for
A) all capacitors. B) parallel wires. C) parallel plates. D) concentric cylinders.
A star is moving towards the earth with a speed at 90% the speed of light. It emits light, which moves away from the star at the speed of light. Relative to us on earth, what is the speed of the light moving toward us from the star?
A) 0.90c B) c C) 1.1c D) 1.20c E) 1.9c
A hot object that is glowing orange will become redder as it cools
a. True b. False Indicate whether the statement is true or false
Why is Neptune denser than Saturn?
A) It has a different composition than Saturn, including a higher proportion of hydrogen compounds and rocks. B) It has a greater proportion of hydrogen than Saturn. C) The extra mass of Neptune compresses its interior to a greater extent than that of Saturn. D) Its hydrogen is molecular, whereas Saturn's hydrogen is atomic. E) It is not denser than Saturn.