Which best describes a radioactive isotope?
(a) an atom is unstable.
(b)an atom...
Physics, 23.12.2019 05:31 BluVoid9255
Which best describes a radioactive isotope?
(a) an atom is unstable.
(b)an atom is stable.
(c)there is only one other isotope.
(d)there are many isotopes
Answers: 3
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Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".
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Physics, 22.06.2019 21:00
If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?
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