The Correct choice is : C. <u>Solids</u>
Sound waves need a medium to propagate, and the most suitable medium for that is solids, where it travel the fastest or with greatest efficiency.
A river's width and depth increases as more water is added from tributaries.
Answer:
Its d
Explanation: Because president kenndeys goal was to beat the soviets in the race to go to the moon/explore space
Answer:
That depends on the basic principles of the sun rising every day and generating some degree of heat. When the sun sets, that heat source disappears. That concept is easy to understand because you can see the process.
Explanation:
