D) the north star is not part of our solar system...
hope this helps!
Answer:
GPS Satellites.
Explanation:
You will always be able to have access to 4 of them no matter where you are on the Earth. This is useful for triangulation.
Answer:
similar wave amplitudes
Explanation:
When two waves travelling in the same medium have similar wave amplitudes they are less likely to interfere with each other destructively or constructively because the interference between waves occur when the amplitudes of the waves arrive a position in the medium in opposite directions hence they add up( superposition) or cancel each other out.
Hence if the waves have similar wave amplitudes the interference between the waves will be limited.
Metals contain the most and semiconductors contain the least amount. Hope this helps.
