Jonah is learning about electromagnetic and mechanical waves in school. He writes a list comparing both types of waves. The table shows his list. Waves
Only electromagnetic waves can travel through solids.
Only mechanical waves need to travel through a medium.
Both types of waves can can travel at different speeds.
Both types of waves transmit energy over long distances.

Jonah made a mistake in his list. What mistake did he make, and what should he write to correct his mistake?

Imagine you work as a consultant, and your daily job involves listening to the constructive criticism of others. as part of your job, you must listen to opposing viewpoints to make important decisions. in this activity, you are a consulting dam engineer. you must make a decision about four different dams; should they be repaired, taken down, or left alone? you will listen to contrasting opinions about what should be done with the dams before you make the final decision. as the consulting dam engineer, what do you decide to do with this dam? explain your reasoning. by making your decision, did you support the opinions of the mayor and/or the dam safety official? why or why not? (site 1)

Which law represents the thermodynamic statement of the conservation of energy of a system? a. the fourth law b. the first law c. the second law d. the third law

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature