Chemistry, 20.07.2019 13:30 sporting06
A3.5 gram sample of a radioactive element was formed in a 1960 explosion of an atomic bomb at johnson island in the pacific test site. the half-life of the radioactive element is 28 years. how much of the original sample will remain in the year 2030? choose the closest. do not guess, only comment if you know
Answers: 2
Chemistry, 21.06.2019 22:30
Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? a. the wings are analogous structures that evolved differently and do not have a similar internal structure. b. the wings are homologous structures that evolved differently and do not have a similar internal structure. c. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. d. wings of bats are vestigial structures, but the wing structures of birds are not vestigial
Answers: 1
Chemistry, 22.06.2019 02:30
If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms
Answers: 1
Chemistry, 22.06.2019 18:50
At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver
Answers: 1
A3.5 gram sample of a radioactive element was formed in a 1960 explosion of an atomic bomb at johnso...
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