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Tutor profile: Kyle V.

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Kyle V.
High School Science Teacher for 2 years
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Questions

Subject: Physics (Waves and Optics)

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Question:

How would you easily determine the qualitative characteristics of images formed by mirrors?

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Kyle V.
Answer:

Identify the location of the object. For the size, if it is: <C (enlarged) =F (no image formed) =C (same size) >C (reduced) For the image type, if it is: <F (virtual) =F (no image) >F (real) Example: Identify the qualitative characteristics of the image formed by an object placed 4 cm in front of a concave mirror with f = 3 cm. 1. Since f = 3 cm and C (or 2F) is 6 cm, object distance is in less than C, therefore ENLARGED. 2. Since do=4cm > f=3 cm, image is REAL. 3. Since image is real, image is automatically INVERTED.

Subject: Basic Chemistry

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Question:

Using the ideal gas law, how do you determine the molar mass of a certain gas given only its pressure, temperature, and density?

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Kyle V.
Answer:

The Ideal Gas Law equation is PV = nRT. 1. Identify the given variables. That would be P, T, and d. 2. If you can notice, there is no density in the Ideal Gas equation. 3. From PV = nRT, change it to PV = (mass/mol)RT because n = mass/mol. 4. Density is equal to mass/volume. With that, derive the equation in terms of density. That would be m/V = Pmol/RT. In terms of density, it would be d=Pmol/RT. 5. Solve for the number of moles. That would be dRT/P = mol. 6. Get the molar mass by dividing the mass by no. of mole. Step-by-step derivation: PV = nRT (original) PV = (mass/mol)RT PV = massRT/mol Pmol/RT = mass/V Pmol/RT = dP mol = dPRT/P MM = mass/mol

Subject: Biology

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Question:

How do tiny mutations on the genetic material affect the survival of populations?

Inactive
Kyle V.
Answer:

With a change in phenotypes, there may be genetic drifts. Some organisms may show traits that would make them more noticeable or more difficult to adapt to their environment. Some organisms may attract or lose more possible mates based on their phenotype. Lower mating rates are vulnerable to extinction. In a nutshell, a tiny mutation that is passed to some organisms and to the next generation will significantly affect their survival as a population.

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