2 years ago

Oil flows upward in the wick of a lantern because of the liquid property called

1 answer:

4 0

Capillarity The state of being capillary; the attraction and repulsion of molecules on the surface of a liquid in contact with a solid, as the walls of it's container ,which results in the rise or fall of a liquid when in narrow tubes or fibers, or in the wetting of a solid by a liquid.

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The absolute magnitude of a star________.

serg [7]

<span>The absolute magnitude of a star is how bright it would appear to us
if it were located ten parsecs (about 32.6 light years) from us. So it's
a way of treating all stars equally ... on a "level playing field" ... and it
describes each star's actual brightness. </span>

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2 years ago

a sample contains 100 g of radioactive isotope. How much radioactive isotope will remain in the sample after 1 half-life?

kap26 [50]

Answer:

$\huge\boxed{50g}$

Definition:

Half-life- The time taken for half of the radioactive isotopes to decay.

Explanation:

How does radioactive decay work? Radioactive decay is a process by which unstable nuclei become more stable through the emission of alpha or beta particles or gamma rays.

Since a half-life is the time taken for half of the isotopes to decay, we can simply divide the initial mass of 100 grams by 2; this gives us 50 grams.

1) Divide 100g by 2.

$\frac{100g}{2}=50g$