| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.59 |
| Score | 0% | 72% |
Momentum is a measure of how difficult it is for a moving object to stop. Which of the following is the formula for momentum?
\(\vec{p} = m\vec{v}\) |
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none of these |
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\(\vec{p} = { \vec{v} \over m}\) |
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\(\vec{p} = {m \over \vec{v}}\) |
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.
The energy posessed by a thrown baseball is an example of what kind of energy?
transitional |
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potential |
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kinetic |
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gravitational |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
Herbivores are __________ that subsist on producers like plants and fungus.
tertiary consumers |
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primary consumers |
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scavengers |
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secondary consumers |
Primary consumers (herbivores) subsist on producers like plants and fungus. Examples are grasshoppers, cows, and plankton.
Small rocks shed by asteroids and comets that reach the earth are called:
meteors |
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shooting stars |
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meteorites |
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meteoroids |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Leafy vegetables, beans, potatoes, fruits, and whole grains are good sources of:
unsaturated fat |
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protein |
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saturated fat |
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fiber |
Fiber provides bulk to help the large intestine carry away waste. Good sources of fiber are leafy vegetables, beans, potatoes, fruits, and whole grains.