| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
Which of the following is the smallest component of an element that still retains the properties of the element?
molecule |
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neutron |
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element |
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atom |
An atom is the smallest component of an element that still retains the properties of the element.
Which of the following is not a vector quantity?
momentum |
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acceleration |
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velocity |
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mass |
Velocity and displacement are vector quantities which means each is fully described by both a magnitude and a direction. In contrast, scalar quantities are quantities that are fully described by a magnitude only. A variable indicating a vector quantity will often be shown with an arrow symbol: \(\vec{v}\)
Velocity is the rate at which an object changes position. What is the formula for velocity?
\(\vec{v} = \vec{d}t \) |
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\(\vec{v} = { \vec{d} \over t } \) |
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\(\vec{v} = { t \over \vec{d} } \) |
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none of these |
Velocity is the rate at which an object changes position. Rate is measured in time and position is measured in displacement so the formula for velocity becomes \(\vec{v} = { \vec{d} \over t } \)
During digestion, after proteins are broken down where does the undigested food go next?
large intestine |
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stomach |
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small intestine |
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esophagus |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
The energy posessed by a thrown baseball is an example of what kind of energy?
potential |
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transitional |
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gravitational |
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kinetic |
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.