The substance must be able to alter its physical characteristic (for example, its color) in accordance to a change in pH. One example of this is litmus paper, which becomes red under acidic conditions and blue under basic conditions.
Lifespan is an indicator that measures the average of the maximum number of years a human can live.
<h3>What is lifespan?</h3>
It is the number of years that a newborn can live according to the standard of mortality by age of the population of its country.
In other words, it is a concept that only makes sense for one generation and is obtained as part of a mortality table that refers to the average number of years that a person is expected to live after birth.
Therefore, we can conclude that lifespan is an indicator that measures the average of the maximum number of years a human can live.
Learn more about lifespan here: brainly.com/question/11445304
#SPJ1
Answer:
anser is 20 thank youjnsbsb
Answer:
lightbulb- electric energy
windmill- motion energy
and i cant see the rest
Explanation:
