| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
brainstem |
|
cerebrum |
|
cerebellum |
|
medulla |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).
Which of the following is the formula for power?
\(P = \vec{w}t\) |
|
\(P = {\vec{w} \over t}\) |
|
\(P = w t\) |
|
\(P = {w \over t}\) |
Power is the rate at which work is performed or work per unit time: \(P = {w \over t}\) and is measured in watts (W).
The hottest of Earth's atmospheric layers is which of the following?
thermosphere |
|
troposphere |
|
mesosphere |
|
stratosphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.
When two air masses meet and neither is displaced, what kind of front is present?
occluded |
|
warm |
|
stationary |
|
cold |
When two air masses meet and neither is displaced, a stationary front is created. Stationary fronts often cause persistent cloudy wet weather.
Water has a refractive index of 1.33. Which of the following is true?
light is 1.33 times brighter in a vacuum than it is in water |
|
light travels 1.33 times slower in a vacuum than it does in water |
|
light travels 1.33 times faster in a vacuum than it does in water |
|
light is 1.33 times dimmer 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.