Examlex
Geosynchronous satellites orbit the Earth at a distance of 42,000 km from the Earth's center.Their angular speed at this height is the same as the rotation rate of the Earth,so they appear stationary at certain locations in the sky.What is the force acting on a 2000-kg satellite at this height? The radius of the Earth is
) (Hint: Use that gravity behaves as
) )
Sexual Isolation
A mechanism of evolutionary divergence where different species or populations can no longer interbreed due to behavioral or genetic barriers.
Gametic Isolation
A prezygotic barrier where gametes (egg and sperm) of different species are incompatible, preventing fertilization.
Mechanical Isolation
A form of reproductive barrier where differences in the size and shape of reproductive organs prevent mating between species.
Sympatric Speciation
The evolution of a new species within the same geographic region as the parental species. Compare with allopatric speciation.
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