| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.48 |
| Score | 0% | 70% |
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
reflection |
|
radiation |
|
conduction |
|
convection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
These clouds grow upward and can develop into cumulonimbus or thunderstorm clouds.
stratus clouds |
|
cumulus clouds |
|
cirrus clouds |
|
nimbus clouds |
Cumulus clouds are large, puffy, mid-altitude clouds with a flat base and a rounded top. These clouds grow upward and can develop into a cumulonimbus or thunderstorm cloud.
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 |
|
light is 1.33 times dimmer in a vacuum than it is in water |
|
light travels 1.33 times slower in a vacuum than it does in water |
|
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.
50°F is how many °C?
122 |
|
-10 |
|
58 |
|
10 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (50 - 32)\)
\(C° = {5 \over 9} (18)\)
\(C° = {90 \over 9}\)
\(C° = 10\)
212°F is how many °C?
100 |
|
\(135 {5 \over 9}\) |
|
-100 |
|
0 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (212 - 32)\)
\(C° = {5 \over 9} (180) = {{180 \times 5} \over 9}\)
\(C° = {900 \over 9}\)
\(C° = 100\)