instruction:
In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
question:
Question: If Jim is tuning his shortwave radio and he decreases the wavelength, what happens to the frequency? 
 Answer: increases
answer:
As wavelength increases, frequency decreases.


question:
Question: When we get to the bottom of a mountain the air is 
 Answer: more dense
answer:
At higher elevations, there is less air to press on a given area.


question:
Question: Will was pulling some magnets apart. When is the electrostatic force the highest? 
 Answer: when the magnets are close
answer:

The closer the charged objects are, the stronger the electrostatic force.