Physics, 28.09.2019 21:30 sabrinarasull1pe6s61

Let f(r, 0, ) be a harmonic function (written in spherical coordinates). we define sr to be the the sphere of radius r centered at the origin. we denote the average of f interesting observation regarding f for harmonic functions f. we assume that f is a function of r and over this sphere by f. our goal is to make an f(r) write it as (a) write down the divergence theorem (gauss's theorem) for the vector field vf integrated surface sr over the 1 s vf da in terms of the function f (r) and its derivatives (b) use spherical coordinates to express (c) use what you learned in part (a) from gauss's theorem to show that f(r) is independent of r. deduce that the average of a harmonic function over a function at the center of the sphere. sphere is equal to the value of the

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the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this. hope that you like the video and that it explains more in detail to you.

that is the link.

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Answer from: Quest

All these statements are related to drake's equation. it is a probabilistic equation that shows an aproximate number of civilizations in our galaxy that we can communicate with. all the numbers that are inserted into equation are not precisely known so the result varies from 1000 to 100,000,000. the equations was not created to calculate exact number of extraterrestrial civilizations but to increase scientific knowledge how to find them.the equation is: $n= r_{*} *f_{p}*n_{e}*f_{l}*f_{i}*f_{c}*l$ where: n= represents the number of civilizations in our galaxy that we could in principle communicate with today. $r_{*} =$ the average rate of star formation in our galaxy $f_{p} =$ the fraction of those stars that have planets $n_{e} =$ represents the number of planets in the galaxy that are in principle capable of having surface liquid water and life. $f_{l} =$ essentially represents the probability that life eventually arises on a habitable planet. represents the number of life-bearing planets in the galaxy. $f_{i} =$ epresents the total number of planets on which intelligent beings have evolved and developed a communicating civilization at some time in the galaxy's history. $f_{c} =$ essentially represents the probability that on a planet with life, some organisms will eventually evolve to the point where they can build radio telescopes. $l =$ is a factor that depends on how long civilizations that reach our level of technology are able to survive.

Answer from: Quest

Ur mom because that makes a lot of sense

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Let f(r, 0, ) be a harmonic function (written in spherical coordinates). we define sr to be the the...