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3 years ago

No links plz... 1. Define the following terms as they relate to radioactive decay

Physics

1 answer:

garik1379 [7]3 years ago

7 0

Explanation:

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation wikipedia

half life is the time it takes something radioactive be gone halfway

Radiometric dating is the method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.

radioactivity affects Earth’s interior by keeping it liquid and hot

The outer core is molten and liquid iron and nickel, while the inner core is solid and much more dense than either iron or nickel at the surface

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A 22.0 kg child slides down a slide that makes a 37.0° angle with the horizontal. (a) What is the magnitude of the normal force

patriot [66]

Answer:

(a) 172.185 N

(b) $53^{\circ}$

Solution:

As per the question:

Mass of the child, m = 22.0 kg

Angle, $\theta = 37.0^{\circ}$

Now,

(a) The magnitude of the normal force exerted by the slide on the child:

$F_{N} = mgcos\theta$

$F_{N} = 22\times 9.8cos37^{\circ} = 172.185\ N$

Now,

(b) The angle from the horizontal at which the force is directed is:

$90^{\circ} - 37^{\circ} = 53^{\circ}$

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