Let c be the closed, piecewise smooth curve formed by traveling in straight lines between the points (0, 0, 0), (2, 0, 14), (3, 2, 21), (1, 2, 7), and back to the origin, in that order. (thus the surface s lying interior to c is contained in the plane z = 7x.) use stokes' theorem to evaluate the following integral.

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

Argon, neon, and xenon are examples of