A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 225 hz. A person on the platform right next to the speaker detects the sound waves reflected off the wall and those emitted by the speaker.

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Blank is the amount of energy in a sound wave per unit of time and is also related to the loudness of a sound

Classify each action depending on whether it will meet or fail to meet the goals of the organization. a group of students form a healthy earth club at their school. their goal is to limit their school’s impact on human-led climate change. they brainstormed a list of actions they can take to meet this goal.