How long has africa and north america moved Africa and North America are moving away from each other at a velocity (rate) of 3 cm/year. b) Africa and North America are presently 6000 km apart.

Africa and North America have moved away from each other for 2 × 10⁸ years.

Meaning they were right next to each other 200 million years ago.

Explanation:

Given,

- Africa and North America are moving away from each other at a velocity (rate) of 3 cm/year.

-Africa and North America are presently 6000 km apart.

Speed = distance/time

Time = distance/speed.

Distance = 6000 km = 6000000 m

Speed = 3 cm/year = 0.03 m/year

Time = 6000000/0.03 = 2 × 10⁸ years.

in 1948, swiss engineer/amateur mountaineer george de mestral went hiking in the woods with his dog. when they arrived back home, george found burrs stuck to his dog’s fur. this inspired him to create velcro.

explanation:

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