What Does It Mean for Waves to Be in Phase?

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Waves are considered "in phase" when their crests and troughs align, meaning they move in the same direction and have matching points. This alignment results in constructive interference, enhancing the amplitude of the combined waves. The discussion revolves around confirming the understanding of this concept, with participants expressing uncertainty about the definition. Clarification is sought regarding the implications of waves being in phase. Understanding this principle is essential for grasping wave behavior in physics.
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Homework Statement



If two waves were moving in the same direction and the crests from each wave matched up, these waves would be in phase. True or false?

Homework Equations





The Attempt at a Solution


true?
 
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suzycue303 said:

Homework Statement



If two waves were moving in the same direction and the crests from each wave matched up, these waves would be in phase. True or false?

Homework Equations





The Attempt at a Solution


true?

Why do you think so?
 
I'm really not sure what it means for waves to be "in phase"
 
suzycue303 said:
I'm really not sure what it means for waves to be "in phase"

Ah. Well that would be a good start. Textbook?
 

Thread 'Magnitude of buoyant force in fluids of different densities'

The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?
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