For laminar flow in a circular tube, the velocity is given by
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A star that is hot and has low luminosity must have ________.
A. a very low velocity B. a very large radius C. a very great distance D. a very small radius E. a very small mass
The correct way to connect an ammeter and a voltmeter to make measurements of a circuit element is
A. both should be in parallel with the circuit element B. both should be in series with the circuit element C. an ammeter is always in series with the circuit element and a voltmeter is always in parallel with the circuit element D. an ammeter is always in parallel with the circuit element and a voltmeter is always in series with the circuit element
How many of the infinite number of Balmer spectrum lines are in the visible spectrum range?
A) none B) 2 C) 4 D) 6 E) infinite
On an H-R diagram, stellar radii
A) are greatest in the lower left and least in the upper right. B) decrease from left to right. C) are impossible to determine. D) increase diagonally from the lower left to the upper right.