Which of the following substances is readily attracted to a magnet?
a. Gold
b. Nickel
c. Carbon
d. Nitrogen
Ans: b. Nickel
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Spheres of Charge: A thin spherical metal shell of radius 8.0 cm carries 7.5 µC of excess charge. What is the magnitude of the electric field it produces at the following places? (k = 1/4??0 = 9.0 × 109 N ? m2/C2) (a) at 1.0 cm above the surface(b) at 7.0 cm from the center of the sphere
What will be an ideal response?
Modern aircraft weather radars operate in the _____________ portion of the EM spectrum
Fill in the blank(s) with correct word
Most star names, such as Aldebaran and Betelgeuse, are in __________
a. Latin. b. Greek. c. Arabic. d. English. e. Italian.
Suppose you live in the United States and you see a crescent moon in your evening sky tonight. What will a friend in South America see tonight?
A) a crescent moon B) Your friend won't see the Moon tonight, because in South America, it will be visible only in the morning. C) a gibbous moon D) a first-quarter moon