| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.05 |
| Score | 0% | 61% |
An electrically charged atom is a(n):
proton |
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ion |
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neutron |
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electron |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = { t \over \vec{d} } \) |
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none of these |
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\(\vec{v} = \vec{d}t \) |
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\(\vec{v} = { \vec{d} \over t } \) |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)
Cellular fermentation takes place:
anaerobically |
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in the presence of oxygen |
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aerobically |
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in plant cells |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
212°F is how many °C?
-100 |
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100 |
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\(135 {5 \over 9}\) |
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0 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (212 - 32)\)
\(C° = {5 \over 9} (180) = {{180 \times 5} \over 9}\)
\(C° = {900 \over 9}\)
\(C° = 100\)
Which of the following represents the largest value?
1 ML |
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1 cL |
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1 kL |
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1 mL |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.