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Spanish, 10.11.2020 22:10 milagrosee12

A mechanical wave is traveling through medium A. When the wave enters medium B, it speeds up. Which of these statements is true about medium A and medium B? 1.Medium A is a solid and medium B is a gas.
2.Medium A is a liquid and medium B is a solid.
3.Medium A is a gas and medium B is a vacuum.
4.Medium A is a vacuum and medium B is a liquid.

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