| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.36 |
| Score | 0% | 67% |
Menstruation occurs when:
the ovum becomes fertilized |
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the ovum fails to become fertilized |
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the zygote is formed |
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the fetus is formed |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
In the metric system, what prefix represents 10-3?
kilo |
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mega |
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milli |
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centi |
In the metric system, milli is the prefix for 10-3.
Momentum is a measure of how difficult it is for a moving object to stop. Which of the following is the formula for momentum?
\(\vec{p} = { \vec{v} \over m}\) |
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\(\vec{p} = {m \over \vec{v}}\) |
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none of these |
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\(\vec{p} = m\vec{v}\) |
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.
__________ is caused by a lack of iron in the diet.
scurvy |
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anemia |
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shingles |
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diabetes |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
Sound travels fastest through which of the following media?
metal |
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water |
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air |
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vacuum |
The speed of a sound wave will vary with the medium. Sound travels fastest through media that has particles that are very close together, like metal. Thus, it travels faster through water than through air and doesn't travel at all through a vacuum (there are no particles in empty space to vibrate).