A superconductor at temperatures below the critical temperature has a magnetic susceptibility equal to _________.
Fill in the blank(s) with the appropriate word(s).
–1
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Bottles of perfume sometimes have thick glass (n = 1.5) walls which give the impression the volume is larger than it is. Assume a cylindrical bottle has an inner radius of 1.0 cm and an outer radius of 2.0 cm. How thick (in cm) would the wall appear if you could see a mark on the inside surface?
a. 0.80 b. 0.51 c. 0.72 d. 80 e. 12
Consider a situation where you carry a 20 N box up a flight of stairs, raising its elevation by 5 m. The increase of potential energy of the box is
a. 0 c. 100 J b. 4 J d. none of the above
Why does Jupiter have three distinct layers of clouds?
A) The three layers represent clouds made of gases that condense at different temperatures. B) Jupiter has three different types of wind, each of which makes a different type of cloud. C) The three layers reflect regions of Jupiter's atmosphere with different chemical compositions. D) Clouds form randomly, so on average there are always three layers.
Atoms of nonmetallic elements form covalent bonds, but they can also form ionic bonds. How is this possible?
A) This happens when one of the bonded nonmetallic elements has a strong electronegativity. B) It happens when one of the nonmetallic elements loses an electron to become a positive ion. C) An ionic bond results when a nonmetallic elements loses an electron to a metallic element. D) An ionic bond results when a nonmetallic elements gains an electron from a metallic element.