Each form element is called a(n) ______.
A. cell
B. field
C. tag
D. label
Answer: B
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Ten coulombs of charge start from the negative terminal of a battery, flow through the battery and then leave the positive terminal through a wire, flow through a resistor, and then return to the starting point on this closed circuit. In this complete process, the ten coulombs:
a. receive heat energy from the resistor. b. do positive work on the battery. c. have a net loss of potential energy. d. have no net change in potential energy.
What is the approximate chemical composition (by mass) with which all stars are born?
A) 3/4 hydrogen, 1/4 helium, no more than about 2% heavier elements B) half hydrogen and half helium C) 98% hydrogen, 2% helium D) 95% hydrogen, 4% helium, no more than 1% heavier elements
As the speed of a particle approaches the speed of light, the mass of the particle
A) increases. B) decreases. C) remains the same. D) approaches zero. E) approaches infinity.
An object is attached to a hanging unstretched ideal and massless spring and slowly lowered to its equilibrium position, a distance of 6.4 cm below the starting point
If instead of having been lowered slowly the object was dropped from rest, how far then would it then stretch the spring at maximum elongation? A) 13 cm B) 9.1 cm C) 6.4 cm D) 18 cm E) 26 cm