Answer: my guess is that they interacted with travelers coming on accident.
Explanation:
Sound wave is a pressure caused by the vibration of something in a medium that transfers anergy, like air.
Answer:
No, I don’t agree that there are enough resources on earth to support increase in per capita consumption rates if human population growth rates stay the same.
Explanation:
- The population is growing at a much higher rate than we expect it to be. According to statistics, in recent years we've been adding about a billion people every 12 or 13 years or so.
- There are no any resource which lasts eternity, so we must use it very wisely.
- And we all know the consequences of the increasing population. The resources are limited and population is excessive so with this rate of growth of population and limited resources, we are the guest for few decades only.
When viewed from the equator (0 degrees latitude), Polaris lies on the northern horizon. As an observer moves northward--say, to Houston, Tex. (30 degrees latitude)-- Polaris is located 30 degrees above the northern horizon.
Answer:
2.62 years
Explanation:
The half life of a material is the time taken for half of the number of radioactive atoms in a radioactive material to remain.
If a radioactive material is cut into pieces, each piece has the same half life as the whole material.
Hence, if Strontium-147 is cut into pieces, each piece will have a half life of 2.62 years, just as the whole material.