The Paschen series of hydrogen corresponds to electron transitions from higher levels to n = 3 . What is the shortest wavelength in that series? (R = 1.097 × 10^7 m?1 and 1 nm = 10?9 m)
a. 1875 nm
b. 820 nm
c. 1580 nm
d. 656 nm
e. 1094 nm
b
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A jet airplane flies at a constant velocity through the air. Its jet engines exert a constant force forward on the plane that exactly balances the force of air friction exerted backward on the plane. These forces are equal in magnitude and opposite in direction. Do we know this because of Newton’s second law or Newton’s third law?
A. Newton’s second law B. Newton’s third law C. Both laws D. Neither (explain)
Which type of molecules, vital to our life, was found in Murchison and similar carbonaceous chondrites?
A) amino acids B) DNA C) lipids D) sugars E) vitamins
H3PO4 is the formula for ______________acid
Fill in the blank(s) with correct word
A 50-gram sample of dry ice (solid CO2) is placed in a 4-liter container. The system is sealed and allowed to reach room temperature (20°C). By approximately how much does the pressure inside the container increase when the dry ice turns to gas? (Ignore the initial volume of the sample.)