Which one of the following is the correct electronic configuration for carbon?
A) 1s2 2s2 2p2
B) 1s1 2p1
C) 1s1 2s2 2p1
D) 1s1 2s1 2p1
E) 1s2 2s2 2p4
A
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Two tanks of gas, one of hydrogen, H2, and one of helium, He, contain equal numbers of moles of gas. The gram-molecular mass of He is twice that of H2. Both tanks of gas are at the same temperature, 293 K. Which statement(s) below is(are) correct when we ignore vibrational motion?
A. The total internal energy of the hydrogen is the same as that of the helium. B. The total internal energy of the hydrogen is 1.4 times that of the helium. C. The total internal energy of the helium is 1.4 times that of the hydrogen. D. The total internal energy of the hydrogen is 1.67 times that of the helium. E. The total internal energy of the helium is 1.67 times that of the hydrogen.
Suppose you viewed a movie that was running backwards. You would see lots of odd things happening: streams would flow uphill, and so forth
If these odd "backward-moving" things actually happened in nature, which principle or principles of physics would be violated? A) Newton's law of motion B) The second law of thermodynamics C) Both of the above. D) The law of conservation of energy E) All of the above.
A 14-A current flows into a series combination of a 3.0-? and a 4.0-? resistor. What is the voltage drop across the 3.0-? resistor?
A) 42 V B) 56 V C) 98 V D) 38 V E) 24 V
What is the typical size of a comet's nucleus?
A) 10 km B) 1 meter C) 100 km D) 1000 km E) Sizes are unknown because the nucleus is obscured by the coma.