| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
Which of the following is not a method of heat transfer?
convection |
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radiation |
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reflection |
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conduction |
Heat is always transferred from warmer to cooler environments through conduction, convection, or radiation.
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
fewer |
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double the number of |
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more |
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equal numbers of |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
The heat from the Sun traveling to Earth is an example of which of the following?
convection |
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conduction |
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radiation |
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electricity |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
Someone who has Rh-factor __________ blood cannot receive blood with a __________ type.
positive, antigen |
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antigen, negative |
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negative, positive |
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positive, negative |
Blood transfer is limited by the type and Rh factor of the blood. Someone who has Rh-factor negative blood cannot receive blood with a positive type but a person with Rh-factor positive type blood can receive Rh-negative blood. Type O negative blood is the universal donor because it can be given to a person with any blood type. Type AB positive is the universal recipient meaning someone with this blood type can receive any other type of blood.
Water has a refractive index of 1.33. Which of the following is true?
light travels 1.33 times faster in a vacuum than it does in water |
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light travels 1.33 times slower in a vacuum than it does in water |
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light is 1.33 times dimmer in a vacuum than it is in water |
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light is 1.33 times brighter in a vacuum than it is in water |
The speed of light varies based on the material that the waves are passing through. The refractive index of a material indicates how easily light travels through it compared to how easily light travels through a vacuum. For example, the refractive index of water is 1.33, meaning that light travels 1.33 times faster in a vacuum than it does in water.