| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
Which of the following is the formula for power?
\(P = {\vec{w} \over t}\) |
|
\(P = {w \over t}\) |
|
\(P = \vec{w}t\) |
|
\(P = w t\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
What kind of weather front is likely to create clouds and storms?
temperate front |
|
cold front |
|
stationary front |
|
warm front |
A warm front is the boundary between warm and cool (or cold) air when the warm air is replacing the cold air. Warm air at the surface pushes above the cool air mass creating clouds and storms.
Which of these is not a component of blood?
marrow |
|
red blood cells |
|
white blood cells |
|
plasma |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
In the metric system, what prefix represents 10-3?
mega |
|
kilo |
|
centi |
|
milli |
In the metric system, milli is the prefix for 10-3.
An air mass is a large body of air that has which of the following characteristics?
similar moisture |
|
all of these |
|
similar density |
|
similar temperature |
An air mass is a large body of air that has similar moisture (density) and temperature characteristics. A front is a transition zone between two air masses.