Answer:
Statement that is true about electromagnetic and mechanical waves is:
Option B: Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium to travel.
Explanation:
'Electromagnetic' waves do not need any medium to travel whereas 'mechanical waves' need a medium or matter for transmission. Electromagnetic waves are produced by the 'vibrations' of the charged particles. They can even travel in vacuum.
On the contrary, mechanical waves are caused by the 'wave amplitude'. Mechanical wave can travel in solid, liquid and gas and are considered to be periodic disturbance.
Thus, Option B is the most statement apt explaining the difference between electromagnetic and mechanical waves.
Answer:
C) oil, a non-renewable source that produces emissions
Answer:
The media presents the news of these calamities in such a manner that puts us in total frenzy and panic which makes us more suceptible to the disease and making our situation even worse.
Answer:
The correct answer is : Dissociative reference group
Explanation:
This kind of group is a group with whom a person does not want to be associated or identified as one of them. He has a concept in which exists a framework that assumes that people's values and attitudes, can be shaped by their identification with. This can happen when you are compared to others.
Answer:
B. To help repay the British debts accrued during the French and Indian war.
Explanation:
