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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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
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?