Hey I'm a junior this year and physics finals are coming up. I managed to get B- on all 3 quarters up until now. And If i cannot get atleast a 92% on my final, I will end up with a C for the year :surprised. So any kind souls out here who can help please it will be appreciated with such a gratitude like you will never believe.(adsbygoogle = window.adsbygoogle || []).push({});

Anyway I mostly need help with word problems so here goes.

A 20.0 cm-amplitude wave travels along a 40.0cm long string from the left end to the right end of the string. If the string has a mass of .01 kg and is under a tension of 500.0 N.

a. Find the speed of the wave on the string.

b. If the string is fixed at both ends, this wave will be reflected with the same amplitude, frequency, and speed, but traveling in the opposite direction. Plucking the string continuously makes a standing wave interference patttern at the resonant frequency because the incident wave traveling to the right will interfere with the reflected wave traveling to the left. Let the incident wave traveling to the right by Y1. and the reflected wave traveling to the left be Y2. Find the frquency of the standing wave corresponding the the 7th overtone.

c. Sketch the standing wave for the 7th overtone.

d. Find the wavelength at the fundamental freequency.

e. Find the fundamental frequency

f. From d and e, write the wave function for Y1 and Y2.

g. Find the resultant disturbance produced when Y1 and Y2 are superimposed.

H.Sketch waveform graph for Y1, showing atleast 4 cycle.s

i. Sketch vibration graph for Y1 showing atleast 4 cycles.

Sorry for such a long problem. But i missed ALL of that section on the test intially. So I have no idea where to start :(.

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# Help on my Final: Thermodynamics, optics, waves

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