Consider the n = 9 shell. (a) What is the largest value of the orbital quantum number, l, in this shell? (b) How many electrons can be placed in this shell?
What will be an ideal response?
(a) 8 (b) 162
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A long wire carrying a 2.0-A current is placed along the y-axis. What is the magnitude of the magnetic field at a point that is 0.60 m from the origin along the x-axis? (?0 = 4? × 10-7 T ? m/A)
A) 6.7 T B) 0.67 µT C) 0.12 µT D) 1.3 µT E) 12 T
The remnant left behind from a white-dwarf supernova is a neutron star
Indicate whether the statement is true or false
G-, K-, and M-type stars
A) do not contain enough heavy elements to form planets B) have lifetimes long enough for planets to form and for simple life to appear, but not long enough for advanced life to develop C) have lifetimes too short for planet formation D) have lifetimes long enough for advanced life to evolve
Where have scientists begun an active search for life beyond the Earth?
A) Mars B) Venus C) the Moon D) Titan E) Europa