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3 years ago

Which explains how the moon causes low tides on the earth?

1 answer:

4 0

The moon exerts pull on the earth. The pull stretches the earth's watery envelope and creates tidal bulges. Where the water is thinnest is low tide. The answer is letter A. Moon tides or lunar tides are caused by the pull of gravity between the moon and earth. The moon will exert a gravitational pull on earth and the earth also pulls the moon towards itself. The results is that the moon is near the earth and formation of oceans tide. Even though the earth can hold any object within its proximity, the ocean is partly attracted due to its liquid property. At night, the ocean tends to be attracted to the moon by creating a bulge and assigning it as ‘high tide’. This is due to the strong gravitational pull of the moon to the earth.

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Darwin's theorized that three conditions were necessary for natural selection to occur, which of the following is NOT one of the

Mekhanik [1.2K]

Answer:

The correct option is: stable environment

Explanation:

According to the Darwin's theory, natural selection is the concept by which all the small useful variations of traits are preserved.

According to Darwin, there are three <u>necessary and sufficient conditions</u> for the occurrence of natural selection:

1. struggle for existence

2. variation

3. inheritance

These conditions are said to be necessary because if these conditions are not satisfied then natural selection does not occur.

These conditions are said to be sufficient because if these conditions are satisfied, then natural selection will most definitely occur.

8 0

3 years ago

You will first investigate 5 diatomic molecules. Diatomic molecules are made up of 2 atoms.

GenaCL600 [577]

Answer:

Here's what I get

Explanation:

1. Fluorine

a. Each fluorine atom has seven valence electrons.

b. Fluorine is a nonmetal.

c. The combination of these atoms creates a covalent bond.

d. The atoms share a pair of valence electrons.

e. In the ionic bond, an electron moved from one atom to the other one.

f. The molecule forms a straight line.

2. Oxygen

a. Each oxygen atom has six valence electrons.

b. Oxygen is a nonmetal.

c. The combination of these atoms creates a covalent bond.

d. The atoms share two pairs of valence electrons.

e. The bond has four electrons instead of two.

f. The molecule forms a straight line.

8 0

3 years ago

Explain what is meant by the natural abundance of isotopes. Can someone help me to answer this plz

Dvinal [7]

“Is a percentage of atoms with a specific atomic mass found in a naturally occurring sample of an element.” < you can try and put it in your own words or you could stick with that just add quotations :)

5 0

4 years ago

5. Citric acid is the main acid present in lemon juice. However vitamin C, or ascorbic acid is

aev [14]

In the titration of lemon juice, the presence of ascorbic acid means the concentration of citric acid you calculated is higher.

An acid-base titration is a common way to determine the unknown concentration of an acid, given we know the concentration of the base and determine the spent volume in the titration. Let's consider the neutralization reactions that take place in a mixture of citric acid and ascorbic acid.

Citric acid titration :

3 NaOH(aq) + H₃C₆H₅O₇(aq) → Na₃C₆H₅O₇(aq) + 3 H₂O(l)

Ascorbic acid titration:

NaOH(aq) + HC₆H₇O₆(aq) → NaC₆H₇O₆(aq) + H₂O(l)

If we titrated a solution that contained only citric acid, we can relate through stoichiometry the moles and concentration of citric acid. However, if the solution also contained ascorbic acid, we would have to spend more NaOH to titrate it. Since more NaOH would react, we would conclude that there is more citric acid to react, calculating a higher concentration of the same.

In the titration of lemon juice, the presence of ascorbic acid means the concentration of citric acid you calculated is higher.

You can learn more about titration here: brainly.com/question/2728613

7 0

2 years ago

An experiment reveals that 125.0 grams of an unknown metal increases in temperature from 22.0 oC to 43.6 oC upon absorbing 640 j

nydimaria [60]

Answer:

Cp = 0.237 J.g⁻¹.°C⁻¹

Explanation:

Amount of energy required by known amount of a substance to raise its temperature by one degree is called specific heat capacity.

The equation used for this problem is as follow,

Q = m Cp ΔT ----- (1)

Where;

Q = Heat = 640 J

m = mass = 125 g

Cp = Specific Heat Capacity = <u>??</u>

ΔT = Change in Temperature = 43.6 °C - 22 °C = 21.6 °C

Solving eq. 1 for Cp,

Cp = Q / m ΔT

Putting values,

Cp = 640 J / (125 g × 21.6 °C)

Cp = 0.237 J.g⁻¹.°C⁻¹

3 0

3 years ago