| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.71 |
| Score | 0% | 54% |
-40°F is how many °C?
\(-{40 \over 9}\) |
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\({40 \over 9}\) |
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-40 |
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-8 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)
The formula for acceleration is which of the following?
\(\vec{a} = { m \over F }\) |
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\(\vec{a} = { m \over \vec{F} }\) |
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\(\vec{a} = { \vec{F} \over m }\) |
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\(\vec{a} = \vec{F} m\) |
Newton's second law of motion leads to the formula for acceleration which is a measure of the rate of change of velocity per unit time and, if you solve for positive acceleration, reveals how much net force is needed to overcome an object's mass. The formula for acceleration is \(\vec{a} = { \vec{F} \over m }\) or, solving for force, \(\vec{F} = m\vec{a}\).
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
atomic mass units |
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electrons |
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protons |
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electron shells |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
In the metric system, what prefix represents 103?
milli |
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centi |
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mega |
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kilo |
Kilo is the metric system prefix for 103.
Respiration is the process by which __________ absorb oxygen and eliminate carbon dioxide.
diaphragms |
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capillaries |
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bronchioles |
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blood cells |
The respiratory system manages respiration which is the process by which blood cells absorb oxygen and eliminate carbon dioxide.