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.
I think the answer is D but I might be wrong.
Answer:
b. in situations requiring the purchase of a product for the very first time.
Explanation:
the purchasing process by first time is the most complicated election, because people usually want to buy the best product with the best specifications for the lowest price, but the real hard fact is the comparison between products take a lot of time and those elements are intrinsic in the purchase decision, for that reason,this is the best situation to use the heuristic strategy with the objective to solve the purchase decision problem with methods, step by step.
You would stick ciabatta into an traditional onion bread sauce recipe.
Answer:
Africa, a continent exceptionally rich in biodiversity, is rapidly urbanizing. ... Urban areas, growing both in population and in land cover, pose threats to the integrity of the continent's ecosystems and biodiversity but their growth also create opportunities for conservation.
Explanation:
