A physics student notices that 4.0 waves arrive at a beach every 20 seconds. The frequency of the wave is

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The Apollo 11 mission was the first mission to land a human on the moon. True False The international space station is a satellite of Earth. True False Astronauts at the international space station stay there for about 6 years. True False

One number is 9 more than twice another number. if the sum of the number is 129, find both numbers.

As an astronaut travels towards Earth, her weight A. decreases because gravity decreases. B. decreases because her mass decreases. C. increases because gravity increases. D. remains the same because her mass remains the same.

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A fast, white water cascade is also known as what?