A circular coil lies flat on a horizontal surface. A bar magnet is held fixed above the center of the coil with its north pole pointing downward. What is the direction of the induced current in the coil, as viewed from above?
A) clockwise
B) counterclockwise
C) There is no current in the coil.
C
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The ______________is the basic building block of a polymer.
Fill in the blank(s) with the appropriate word(s).
A certain chemical reaction has an activation energy of 
What temperature must the reaction be at for the reaction rate to be double the rate at 20
A. 290 K B. 310 K C. 330 K D. 350 K E. 360 K
Which of these statements is true?
a. Aristotle believed that the speed at which objects fall depends on their weight (and he was right). b. Aristotle believed that the speed at which objects fall depends on the medium they fall through (and he was wrong). c. Aristotle believed that a falling object was not trying to reach a goal. d. Aristotle believed that the speed at which objects fall depends on both their weight and the medium they fall through (and he was partly right). e. Aristotle believed that how fast objects fall depends on both their weight and their surrounding medium (and he was right).
What is the hole in the ozone layer thought to be caused by?
A) greenhouse gases B) carbon dioxide C) water vapor D) CFCs E) acid rain