(B)
(C)
(D) 2λ
(E) 4λ
- Lead-199 has a half-life of 1.5 hours. If a researcher begins with
2 grams of lead-199, how much will remain after 6 hours?
(A) 0.125 grams
(B) 0.25 grams
(C) 0.375 grams
(D) 0.5 grams
(E) 0.625 grams
- The square shown is the same size in each of the following
diagrams. In which diagram is the electrical potential energy of the
pair of charges the greatest?