What is the shortest wavelength in the Paschen series?
A) 410.2 ?m B) 365 nm C) 820.4 nm D) 410.2 nm E) 820.4 ?m
C
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Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature (in kelvins) do their readings measure the same temperature?
a. 218.15 b. 233.15 c. 273.15 d. 40.15 e. 0
In hot-work, a metal is deformed at temperatures that are either above the ___________temperature, or above 50 % of the absolute melting temperature.
Fill in the blank(s) with the appropriate word(s).
Mutual gravitation is ____
a. a type of force that acts on an object moving at constant speed b. the acceleration of an object in the absence of a force c. a property of all matter in the universe d. the limit of gravitational force from one object to another e. a type of force that repels surrounding particles
Triton has a retrograde orbit around Neptune. This means that ____________
a. Triton orbits in the same direction as Neptune rotates on its axis. b. Triton orbits in the opposite direction to the way Neptune rotates on its axis. c. Triton does not orbit around Neptune. Instead, it stands still.