2 years ago

Which is easier to observe, physical or chemical properties? why?

1 answer:

6 0

Physical properties are easier to observe than chemical properties as the include characteristics such as color and texture.

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What evidence supports a scientist's conclusion that fossil B is older than fossil A? (4 points)

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Choice B, as time goes on the surface level rises and stuff buried underground gets further and further below surface level.

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The key term which means moon blocks sunlight to the earth is

Lelu [443]

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A lead atom has a mass of 3.14 x 10 to the negative 22nd g.How

frozen [14]

Explanation:

The given data is as follows.

Mass of a lead atom = $3.14 \times 10^{-22}$

Volume = 2.00 $cm^{3}$

Density = 11.3 $g/cm^{3}$

As it is mentioned that 1 cubic centimeter contains 11.3 grams of lead.

So, in 2 cubic centimeter there will be $2 \times 11.3 g = 22.6 g$ of lead atoms.

One lead atom has a mass of $3.14 \times 10^{-22}$ . Therefore, number of atoms present in 22.6 g of lead will be as follows.

$\frac{22.6 g}{3.14 \times 10^{-22}}$

= $7.197 \times 10^{22} atoms$

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3 years ago

Fusion reactors are more desirable than fission because:

Serga [27]

I believe it is A)fuel is more readily available:)

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3 years ago

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What affect does attendance have on students' grades in science class? Write the independent variable, the dependent variable, a

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Independent variable: the student chooses to miss class.
dependent variable: in result of the student missing class his grade goes down.
hyposthesis: if the student misses class multiple times, then his grades will go down.

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3 years ago