Wave Function for harmonic wave :s

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The discussion revolves around understanding the wave function equation y(x,t)=Asin(kx-omega t) for a homework assignment due on October 10th. The poster is seeking clarification on the terms within the equation, identifying k as the wave number and A as the amplitude. Additionally, they recognize that y represents the wave function's value at a specific position x and time t, while omega denotes the frequency. The urgency is heightened by the fact that the poster is new to university and has not yet covered wave functions in class. Overall, the thread emphasizes the need for foundational knowledge in wave functions to complete the assignment.
jesus1987
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Homework Statement


Hi all, I've been given some homework on wave functions to find direction and velocity etc... but as its the first week of uni for me, we haven't even covered wave functions or anything :/ and the homework is due on weds 10th oct...


Homework Equations



y(x,t)=Asin(kx-omega t)

The Attempt at a Solution


Would like to know what the terms are, i know that k is the wave number, but that's about it.
 
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y is the value of the wave function at a specific position x and time t. The amplitude of the wave (the maximum value) is A, and omega is the frequency.
 
Thread 'Correct statement about size of wire to produce larger extension'

Thread 'Correct statement about size of wire to produce larger extension'

The answer is (B) but I don't really understand why. Based on formula of Young Modulus: $$x=\frac{FL}{AE}$$ The second wire made of the same material so it means they have same Young Modulus. Larger extension means larger value of ##x## so to get larger value of ##x## we can increase ##F## and ##L## and decrease ##A## I am not sure whether there is change in ##F## for first and second wire so I will just assume ##F## does not change. It leaves (B) and (C) as possible options so why is (C)...
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