What is the fastest animal on earth that runs on two legs?

Federalism began to spread super soon after

What challenges did nigeria faced after it gained its independence from britain

Which statement is correct? the speed of the light ray is the same in air and medium a. the speed of the light ray is the same in air and medium b. medium a and medium b have different densities because light refracts at different angles. medium a and medium b have the same density because the light ray strikes both at the same angle.