How would the light wave’s speed change when going from liquid to the air? How would the light wave’s speed change when going from air to a solid?

How would the sound wave’s speed change when going from the air to a solid?

How would the sound wave’s speed change when going from a solid to a liquid?

Why should the scientific method be used to answer a question? a. it provides a way to test an idea without any bias. b. it provides a way to test a hypothesis. c. it provides a way to ensure all hypotheses are proven correct. d. it provides a way to quickly turn a hypothesis into a scientific theory.

In which situation can a mixture always be called a solution

Which characteristics can be used to differentiate star systems? check all that apply.