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cluponka [151]
3 years ago
8

Which are characteristics of natural selection? Select three options.

Chemistry
1 answer:
Luda [366]3 years ago
5 0
Affects populations,
Occurs when there is genetic variation
Selects organisms with certain traits to survive.
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What is the mass of an object if force of -136 n can make it accelerate at -9.6 m/s^2
vampirchik [111]

The answer for the following problem is mentioned below.

  • <em><u>Therefore the mass of an object is 14.16 grams.</u></em>

Explanation:

Force:

The push or pull on an object with mass that cause change in the velocity

It is a vector quantity.

The formula to calculate the force is:

F = m × a

Given:

Force (F) = -136 N

acceleration (a) = -9.6 m/s^2

To calculate:

mass of the object (m)

We know that,

<em>F = m × a</em>

where,

F represents the force of the object

m represents mass of an object

a is acceleration of an object

From the equation;

-136 = m × -9.6

m = \frac{-136}{-9.6}

m = 14.16 grams

<em><u>Therefore the mass of an object is 14.16 grams.</u></em>

3 0
4 years ago
why do you think that sodium chloride has to be heated to 800c before melting, but candle wax will start to melt at 50c?
RideAnS [48]

Answer:

Sodium chloride is an ionic compound which makes it stronger and have a higher melting and boiling point. Candle wax is a covalent compound so it has a low melting point.

Explanation:

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3 years ago
Given the pH of 7. Explain how many hydroxide ions (-OH) and hydronium ions (H30+) are present in the solution.
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If the pH is 7, the solution is neutral, which means that it is an equal amount of acid and base.
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KClO3 ---&gt; KCl + O2 Balance the decomposition chemical reaction. A) KClO3 ---&gt; KCl + O2 B) 2KClO3 ---&gt; KCl + 3O2 C) 2KC
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And the answer is C.
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One afternoon, Anne leaves her house and walks 5 blocks north to the post
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The answer is c because five plus two is seven and take away that is 4
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