| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.67 |
| Score | 0% | 73% |
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
small intestine |
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stomach |
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large intestine |
|
mouth |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following is not a method of heat transfer?
reflection |
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conduction |
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radiation |
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convection |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
An air mass is a large body of air that has which of the following characteristics?
all of these |
|
similar temperature |
|
similar moisture |
|
similar density |
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.
The brain and spinal cord make up the __________ nervous system.
central |
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somatic |
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peripheral |
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autonomic |
The nervous system consists of the brain and spinal cord (central nervous system) and the peripheral nervous system which is the network of nerve cells (neurons) that collect and distribute signals from the central nervous system throughout the body.
Which of the following is the formula for power?
\(P = {\vec{w} \over t}\) |
|
\(P = {w \over t}\) |
|
\(P = w t\) |
|
\(P = \vec{w}t\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).