Buildings are more dense than the surrounding air. This means that they have more _____ per volume than the air and will stay on
2 answers:
Answer: Option (a) is the correct answer.
Explanation:
Density is defined as the mass present in a substance in per unit volume.
Mathematically, Density =
Since, density is directly proportional to mass. Hence, more is the mass present per volume of a substance more will be its density. As a result, denser will be the object.
Therefore, we can conclude that buildings are more dense than the surrounding air. This means that they have more mass per volume than the air and will stay on the ground instead of floating up into the atmosphere.
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Answer:
1) The Kelvin temperature cannot be negative
2) The Kelvin degree is written as K, not ºK
Explanation:
The temperature of an object can be written using different temperature scales.
The two most important scales are:
- Celsius scale: the Celsius degree is indicated with ºC. It is based on the freezing point of water (placed at 0ºC) and the boiling point of water (100ºC).
- Kelvin scale: the Kelvin is indicated with K. it is based on the concept of "absolute zero" temperature, which is the temperature at which matter stops moving, and it is placed at zero Kelvin (0 K), so this scale cannot have negative temperatures, since 0 K is the lowest possible temperature.
The expression to convert from Celsius degrees to Kelvin is:
Therefore in this problem, since the student reported a temperature of -3.5 ºK, the errors done are:
1) The Kelvin temperature cannot be negative
2) The Kelvin degree is written as K, not ºK