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Tutor profile: David L.

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David L.
Tutor for 4 Years in Math and Science
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Questions

Subject:Chemistry

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Question:

Explain the difference between protons, neutrons, and electrons.

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David L.

Protons are positively charged molecules that determine the element. The periodic number of the element equates to the number of protons it has. Neutrons are are molecules with no charge, that has roughly the same mass as a proton and adds weight to the element or compound. Electrons are negatively charged molecules that determine how easily an element bonds to other elements to form compounds.

Subject:Biology

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Question:

Explain the difference between mitosis and meiosis.

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David L.

Mitosis is the result of a diploid cell splitting into two daughter cells as the result of one cell division. Mitosis occurs in all organisms (excluding viruses) and is used to produce non-sex cells. It consists of four phases: interphase, prophase, metaphase, anaphase and telophase. Meiosis is the result of a diploid cell splitting into four daughter cells. This occurs because meiosis has two cell divisions. Meiosis occurs only in plants, fungi, and animals and is used to produce sex cells (sperm and egg). It has the same phases as Mitosis, only telophase occurs twice results in four daughter cells.

Subject:Algebra

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Question:

Find x if (x-2)/4 = 5/2

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David L.

1. First you will identify where the variable is located. 2. The variable is located on the left side of the equation as (x-2)/4 3. We want to isolate the variable. 4. In order to isolate the variable we will multiply both sides of the equation by the denominator beneath the variable. 5. Multiply both sides of the equation by 4. 6. Rewrite the equation as: x-2 = 20/2 7. Divide 20 by 2. 8. Rewrite the equation as: x-2 = 10 9. Isolate the variable by adding 2 to the other side of the equation. 10. x = 12

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