<span>a) speed = 100 million m/s and frequency = 50 million Hz </span>
Explanation:
This much is undeniable. Based on the magnetic fingerprints locked into ancient rocks, we know that over the last 20 million years, magnetic north and south have flipped roughly every 200,000 to 300,000 years (this rate has not been constant over the planet's lifetime, though).
This could weaken Earth's protective magnetic field by up to 90% during a polar flip. Earth's magnetic field is what shields us from harmful space radiation which can damage cells, cause cancer, and fry electronic circuits and electrical grids.
C. Sedimentary Layers, sedimentary rocks are created as a result of high pressure :)
I hope this helped!
Answer:
♡hi there! ♡
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hope I could help! have a great day
-madeline
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Explanation:
Answer:
Mitochondria are known as the powerhouses of the cell. They are organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell. The biochemical processes of the cell are known as cellular respiration.
Explanation:
