The corona is heated by magnetic carpets
a. True
b. False
Indicate whether the statement is true or false
True
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Thin Films: A soap bubble has an index of refraction of 1.33. What minimum thickness of this bubble will ensure maximum reflectance of normally-incident light having a wavelength of 530 nm?
A. 24.9 nm B. 76.9 nm C. 99.6 nm D. 199 nm E. 398 nm
The point P lies along the perpendicular bisector of the line connecting two long straight wires S and T that are perpendicular to the page. A set of directions A through H is shown next to the diagram. When the two equal currents in the wires are directed up out of the page, the direction of the magnetic field at P is closest to the direction of
A. E. B. F. C. G. D. H. E. A
At its brightest, Venus, at magnitude -4, is 100 times brighter than a 1st magnitude star
Indicate whether the statement is true or false
A series of 3 uncharged concentric shells surround a small central charge q. The charge distributed on the outside of the third shell is
a. ?3q. b. ?(ln 3)q. c. +q. d. +(ln 3)q. e. +3q.