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Answer:
(in some cosmological theories) nonluminous material that is postulated to exist in space and that could take any of several forms including weakly interacting particles (cold dark matter) or high-energy randomly moving particles created soon after the Big Bang (hot dark matter).
Explanation:
Answer:
The enactment of the Sugar Act and the Stamp Act were both British Laws that were implemented to raise revenue for the British. The Sugar Act was designed to regulate trade, especially in the New England region and the Stamp Act was the first direct tax on home produced and consumed items.
Explanation:
The enactment of the Sugar Act and the Stamp Act were both British Laws that were implemented to raise revenue for the British. The Sugar Act was designed to regulate trade, especially in the New England region and the Stamp Act was the first direct tax on home produced and consumed items.
Answer should be Inca Empire.
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.