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19.03.2020 •
Physics
What does radioactive decay leave behind
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Ответ:
AMSWER:
There are two main types of radiation that can be given off during radioactive decay. The first is particle radiation. It includes alpha and beta particles as well as proton and neutron radiation. The second is electromagnetic radiation.
EXPLANATION:
Radioactive decay is the process by which an atomic nucleus emits particles or electromagnetic radiation to become either a different isotope of the same element or an atom of a different element.
Ответ:
82. Since you have a distance and a force, then the easiest principle to use is energy, i.e. work.
The work done by friction is F * d. This work cancels out the kinetic energy of the stone (1/2)mv^2
Fd = (1/2)mv^2
F = (1/2)mv^2/d.
Plug in m = 20 kg, v = 3 m/sec, d = 40 m.
83. With more mass, the kinetic energy is higher now. The work needed is higher. W = F * d and F is the same.
Explanation:Hope I helped :)