A hydrogen atom is in its first excited state (n = 2). The linear momentum of the electron is (in kg ? m/s)
a. 3 × 10^?24
b. 2 × 10^?24
c. 1 × 10^?24
d. 4 × 10^?24
e. 3 × 10^?15
c
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A projectile is thrown from the top of a building with an initial velocity of 30 m/s in the horizontal direction. If the top of the building is 30 m above the ground, how fast will the projectile be moving just before it strikes the ground?
A. 35 m/s B. 39 m/s C. 31 m/s D. 43 m/s E. 54 m/s
One in 4 600 water molecules contains a deuterium atom. If all the deuterium could be extracted from 1 m3 of water and then reacted, how much energy could be obtained? (Each D-D fusion liberates 3.65 MeV of energy, 1 MeV = 1.6 × 10^–13 J, ?water = 103 kg/m3, one mole of water has a mass of 18 g, and NA = 6.02 × 10^23)
a. 4.2E+12 J b. 1.3E+25 J c. 3.5E+11 J d. 2.1E+12 J e. 6.9E+14 J
A steel container, equipped with a piston, contains 21 mol of an ideal gas at 465 K. The container is compressed isothermally to 90% of its original volume. How much work is done on the gas? The ideal gas constant is R = 8.314 J/mol ? K
A) 8600 J B) -73,300 J C) 11 J D) -8500 J
Color is a reliable physical property to use for mineral identification
TRUE FALSE