In the ground state, the quantum numbers (n, ?, m , ms) for hydrogen are, respectively,
A) 1, 1, 1, 1.
B) 1, 0, 0, 0.
C) 1, 0, 0, ±1/2.
D) 1, 1, 1, ±1/2.
E) 1, 1, 0, ±1/2.
C
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The Sun will exhaust its nuclear fuel in about
A) 5000 AD. B) 5 million years. C) 5 billion years. D) 50 billion years.
When a 10-kg block is simultaneously pushed toward the east with 20 N and toward the west with 15 N, the combination of these forces on the block is
A) 5 N west. B) 5 N east. C) 35 N east. D) 35 N west.
Nuclear Binding Energy: How much energy is released when 0.60 ?g of 3H have decayed to 3He? The mass of 3He is 3.0160293 u, the mass of 3H is 3.0160492 u, 1 u = 931.5 MeV/c2, 1 eV = 1.60 × 10-19 J, and NA = 6.022 × 1023 molecules/mol.
Fill in the blank(s) with the appropriate word(s).
In a section of horizontal pipe with a diameter of 3.0 cm, the pressure is 100 kPa and water is flowing with a speed of 1.5 m/s. The pipe narrows to 2.0 cm
What is the pressure in the narrower region? Treat the water as an ideal incompressible fluid. A) 44 kPa B) 48 kPa C) 67 kPa D) 230 kPa E) 95 kPa