Answer:
Radio noise is a combination of natural electromagnetic atmospheric noise created by electrical processes in the atmosphere like lightning, manmade radio frequency interference from other electrical devices picked up by the receiver's antenna, and thermal noise present in the receiver input.
By looking at the map that shows a portion of the western United States and Canada. The graph that best represents the average monthly air temperature for both Vancouver and Winnipeg is the fourth graph or number 4.
<u>Answer:</u>
A solid hollow cylinder has an "infinite number of planes of symmetry".
<u>Explanation:</u>
- Two or more faces are said to be symmetric when they have the same dimensions and are geometrically identical.
- When these faces are placed in a setting with 'X', 'Y' and 'Z' axes "perpendicular to each other", they make a plane with three lines of symmetry. A circle has "infinite lines of symmetry".
- Thus, a cylinder with two openings has an "infinite number" of "planes of symmetry".
