According to the periodic table entry, how many electrons does nickel have in its valence level? A.2
B.8
C.16
D.28

The de broglie relation λ=h/p can be rewritten in terms of the wave number k as p=kℏ. recall that wave number is defined by k=2π/λ. using the fact that λ=v/f, find the wave numbers k1 and k2 corresponding to frequencies f1 and f2. express your answer as two expressions

What is magnetic flux? explain faraday's law of induction.

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.