A flask contains a mixture of argon and neon gases at a stabilized temperature. The root-mean-square speed of the argon gas is determined to be 1.21 km/s
What is the root-mean-square speed of the neon gas? The atomic mass of argon is 39.95 g/mol, and that of neon is 20.18 g/mol.
1700 m/s
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The Rosetta mission to the comet 67P/Churyumov-Gerasimenko is an example of which kind of robotic space mission?
A) lander/probe B) flyby C) sample return D) orbiter
Transmitting power at high voltage, e.g., 400,000 V, reduces the power loss for transmission lines. But such a voltage would destroy electrical devices in household use. How then can such 400,000 V electricity be used in a normal house?
a. The ground prongs on household plugs reduce the voltage to 120 V. b. Before reaching households, transformers are used to reduce the voltage appropriately. c. No matter the incoming voltage, a 120-V device only lets 120 V in. d. The 400,000 V is just theoretical; long distance transmission lines actually use 120 V.
A person uses a converging lens of focal length 5.0 cm as a magnifying glass
(a) What is the magnification if the person's eye is relaxed? (b) What is the maximum possible magnification?
What is the direction of 
at point Q?
A. A B. B C. C D. D E. E F. F T. Zero