The common element discovered in the Sun's spectrum before it was found here is ________
Fill in the blank(s) with correct word
helium
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SAE 50 oil at 70ºF flows through a 2 ft long copper tube of ¼ inch inside diameter. What must the pressure drop be through the tube if 10 lbm/min of oil is flowing through the tube?
What will be an ideal response?
What types of observations are necessary to determine the motion of a star through space?
What will be an ideal response?
An electrical generating plant operates at a boiler temperature of 200°C and exhausts the unused heat into a nearby river at 20°C. What is the maximum theoretical efficiency of the plant? (0°C = 273 K)
a. 61% c. 21% b. 38% d. 41%
The restriction that no more than one electron may occupy a given quantum state in an atom was first stated by which of the following scientists?
a. Bohr c. de Broglie b. Pauli d. Heisenberg