Atoms are mostly empty space
a. True
b. False
Indicate whether the statement is true or false
True
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If elements A and B chemically bond to each other more strongly than a random mixture of A and B elements chemically bond, it is expected that a _____________ of A and B should form.
Fill in the blank(s) with the appropriate word(s).
The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates must
A) increase. B) decrease. C) remain constant. D) There is no way to tell from the information given.
An object of mass m sits on a flat table. The Earth pulls on this object with force mg, which we will call the action force. What is the reaction force?
A) The table pushing up on the object with force mg. B) The object pushing down on the table with force mg. C) The table pushing down on the floor with force mg. D) The object pulling upward on the Earth with force mg. E) The table pulling upward on the Earth with force mg.
A standard unit
a. is the same in all systems of units. b. may not be fixed in value. c. is found only in the British system. d. is used for taking accurate measurements. e. is found only in the metric system.