| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
Large, puffy, mid-altitude clouds with a flat base and a rounded top describe which of the following?
fog |
|
cirrus clouds |
|
stratus clouds |
|
cumulus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
Which of the following states of matter exists at the lowest temperature?
none of these |
|
solid |
|
gas |
|
liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.
The respiratory and circulatory systems are similar in that they:
transport nutrients |
|
transport oxygen |
|
deoxygenate blood |
|
add carbon dioxide |
Like the respiratory system, the circulatory system serves to transport oxygen throughout the body while removing carbon dioxide. In addition, the circulatory system transports nutrients from the digestive system.
-40°F is how many °C?
\({40 \over 9}\) |
|
-8 |
|
\(-{40 \over 9}\) |
|
-40 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)
Momentum is a measure of how difficult it is for a moving object to stop. Which of the following is the formula for momentum?
\(\vec{p} = { \vec{v} \over m}\) |
|
none of these |
|
\(\vec{p} = {m \over \vec{v}}\) |
|
\(\vec{p} = m\vec{v}\) |
Momentum is a measure of how difficult it is for a moving object to stop and is calculated by multiplying the object's mass by its velocity: \(\vec{p} = m\vec{v}\). Like velocity, momentum is a vector quantity as it expresses force applied in a specific direction.