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1. ### Destructive Interference

Thanks for the clarification. Appreciated
2. ### Destructive Interference

I would say 1.6 m but would that be all there is to the question though.
3. ### Destructive Interference

Thanks for getting back to me. I have worked out the lamda to be 1.6 m. Do I need to set up the right equations to have them going opposite directions and see where they sum to zero?
4. ### Crate being pulled

Thanks for the direction. Is this what you meant? Horizontal: mgsin30 = f + Fcos30 = uN + Fcos30 Vertical: N = Fsin30 = mgcos30 To resolve = Add N into N in equation for Horizontal
5. ### Crate being pulled

Good evening. I would appreciate if someone could verify the following please. The question: A 100kg crate is pulled across a horizontal floor by a force P that makes an angle of 30 degrees above the horizontal. The coefficient of kinetic friction between the crate and floor is 0.200...
6. ### Destructive Interference

Good day I have tried the following problem a few times and come up with ansers larger than 3.20m. The problem: Two speakers are 3.20m apart and facing the same direction and are in phase. They each produce a 214Hz tone. What is the shortest distance directly in front of one speaker where...
7. ### Destructive Interference

Good day - I would appreciate some direction. I have done the problem a few different ways and end up with different answers each time - which seems to be reasonable answers to all. Two speakers are 3.2 m apart and facing the same directions are in phase. They each produce 214 Hz tone. What...