/sci/ - Science & Math

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Anonymous Thu Sep 17 03:57:54 2020 No.12130419 [Reply] [Original]

Does anyone know how to solve this shit? tried /wsr/, nobody managed to solve it in the past 3 days.

>>	Anonymous Thu Sep 17 04:13:29 2020 No.12130442 >>12130419 Send dollars, I'll solve it for you.

>>	Anonymous Thu Sep 17 04:22:44 2020 No.12130456 >>1213044 If I had dollars to give, I'd be on chegg not this place.

Anonymous Thu Sep 17 05:02:34 2020 No.12130537

>>12130419
question 2: start by evaluating the vector field at the point P by substituting the t, phi, theta values. Then, the point P's location is given in spherical coordinates you can immediately tell that P lies on the surface of the sphere (that might be obvious from the wording too, but I wouldn't know, I'm ESL). This means that the perpendicular vector component is just the r component of F (and zero on the other 2 components), and the parallel component is just the theta and phi components, and zero on r.

question 3: I can't be bothered to type. Literally just look up the divergence theorem, calculate the 2 integrals, see that the result is the same.

>>	Anonymous Thu Sep 17 05:04:11 2020 No.12130541 >>12130537 Okay, got Q2 right, thanks. For Q3, can you post the answer, so I can check if I got the same thing?

>>	Anonymous Thu Sep 17 05:07:45 2020 No.12130550 >>12130541 Believe in your self.

>>	Anonymous Thu Sep 17 05:08:42 2020 No.12130553 >>12130550 The assignment is worth 10%, theres no reason to believe in myself for 1/10th of the semester.

>>	Anonymous Thu Sep 17 05:14:30 2020 No.12130559 >>12130553 Then drop out if you can’t be bothered to figure out some standard problems.

>>	Anonymous Thu Sep 17 05:16:08 2020 No.12130560 >>12130541 Either believe in yourself or use wolfram alpha. If the two integrals give the same result it's almost surely right anyway.

Anonymous Thu Sep 17 05:37:19 2020 No.12130594

>>12130559
>Then drop out if you can’t be bothered to figure out some standard problems.
Holy shit, why do you have to be so arrogant. I came here asking for help, the guy didn't want to write the steps so I just asked for the answer so I can check if I got it right or not, and try again. Were you fucking born knowing everything? Why the fuck should I drop out because I don't know something, that's how you fucking learn. We've never done surface integrals directly in cylindrical or spherical vector fields, we always started in cartesian, set up the integral and then converted to polar. I'm asking for some help or at least a link to where I could learn how to solve it. So get off your fucking high horse.

>>	Anonymous Thu Sep 17 05:38:26 2020 No.12130597 >>12130560 I tried to use wolfram alpha, it doesn't do surface integrals in cylindrical or at least I couldn't figure out how.

>>	Anonymous Thu Sep 17 06:02:10 2020 No.12130643 File: 56 KB, 1172x659, 1588334251288.jpg [View same] [iqdb] [saucenao] [google] >>12130594 >Were you fucking born knowing everything?

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