| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.93 |
| Score | 0% | 59% |
Absolute zero is which of the following?
the freezing point of hydrogen |
|
0°C |
|
the coldest temperature possible in the universe |
|
the freezing point of oxygen |
In contrast to the Celsius scale (measured in degrees centigrade) that fixes 0° at the freezing point of water and the Fahrenheit scale that uses 32°, the Kelvin scale fixes 0 at absolute zero (-273°C) which is the lowest temperature possible in the universe.
-40°F is how many °C?
-8 |
|
\({40 \over 9}\) |
|
-40 |
|
\(-{40 \over 9}\) |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (-40 - 32)\)
\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)
\(C° = {-360 \over 9}\)
\(C° = -40\)
What part of the brain is responsible for for balance, movement, and muscle coordination?
cerebellum |
|
medulla |
|
brainstem |
|
cerebrum |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
The __________ nervous system regulates involuntary activity in the heart, stomach, and intestines.
autonomic |
|
somatic |
|
peripheral |
|
central |
Part of the peripheral nervous system, the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
fewer |
|
double the number of |
|
more |
|
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.