Answer:
The sun is a major source of ultraviolet rays. Though the sun emits all of the different kinds of electromagnetic radiation, 99% of its rays are in the form of visible light, ultraviolet rays, and infrared rays (also known as heat).
Explanation:
Any answer choices ? but the answer is between 610 - 617
Answer:
computer use and skills are nearly universal
Explanation:
Analysis has shown that the use of computer has greatly increased in developed countries. Computer use and skills are nearly found everywhere because it’s a key marker o technological progress in those areas. People living in those areas have greater excess to internet facilities and a greater number of the population are saying they are taking advantage of these high-tech tools at work or at home.
I believe the answer is: Field research
Field research refers to a form of research which data is accumulated from other places outside our work-room or laboratories. What considered as 'outside' places would be varied depending on the discipline that being studied. For social studies, environment outside the place where the researchers accustomed to would be considered as outside environment.
Answer:
This is an example of an experimental design.
Explanation:
Experimental design in research involves controlling the variables in order to prove the hypothesis. In an experimental design there must be an experimental group, that in this case is the group that received an herbal supplement, and a control group, that was only administered placebo. By having a control group, both groups can be measured and compared at the end of the experimental phase, to measure the influence of the independent variable.
