Three identical resistors are connected in parallel to a battery. If the current of 12. A flows from the battery, how much current flows through any one of the resistors?
A) 12 A
B) 4 A
C) 6 A
D) 18 A
E) 36 A
B
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A major surprise from space exploration is that ________ exists at the poles of both Mercury and our Moon
Fill in the blank(s) with correct word
A stone is thrown downward from a tall cliff and hits the ground below. If it were instead thrown straight upward with the same initial speed, it would end up striking the ground below (neglect air resistance) with
1) the same speed. 2) less speed. 3) greater speed. If air resistance IS a factor, then when the stone is moving downward it will undergo 4) an increase in acceleration as velocity increases. 5) a decrease in acceleration as velocity increases. 6) a constant acceleration.
Comet nuclei typically have an average density of 0.5 g/cm3. This suggests a(n) ________ composition.
A. icy and gaseous B. icy and rocky C. icy and loosely packed D. gaseous and rocky E. gaseous
Why might increasing the temperature alter the rate of a chemical reaction?
A) The molecules will have a higher kinetic energy and bump into one another harder. B) The molecules are less reactive at higher temperatures. C) The molecules will more likely combine with other atoms at high temperature to save space. D) The density decreases as a function of temperature and this leads to an increase in volume which drops the rate of reaction. E) none of the above