| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
Which of the following is the formula for power?
\(P = w t\) |
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\(P = {w \over t}\) |
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\(P = \vec{w}t\) |
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\(P = {\vec{w} \over t}\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
"An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force." This describes which of Newton's laws of motion?
fourth |
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third |
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second |
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first |
Also known as the law of inertia, Newton's first law of motion states that An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
During digestion, the kidneys filter substances from the blood. Which of the following is not filtered by the kidneys?
salt |
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minerals |
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fats |
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water |
Chemical waste like excess water, minerals, and salt are filtered from the blood by the kidneys and secreted into the urine. Urine is transported from the kidneys to the bladder through ureters.
Examples of tertiary consumers include:
sharks |
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chickens |
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fish |
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cows |
Tertiary consumers eat primary consumers and secondary consumers and are typically carnivorous predators. Tertiary consumers may also be omnivores. Examples include wolves, sharks, and human beings.
Which of the following states of matter exists at the highest temperature?
solid |
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gas |
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none of these |
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liquid |
Solids exist at a lower temperature than liquids which exist at a lower temperature than gases.