When a hydrocarbon or carbon-hydrogen-oxygen compound is burned completely, the products are
a. CO2 and H2O.
b. CH2 and O2.
c. CO and H2.
d. C and H2.
a
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What physical feature of our planet is most dependent on supernova events?
a. oceans of water b. a breathable atmosphere c. organic chemicals d. uranium in Earth's interior e. a nickel-iron core
Why might the presence of a giant planet be both good and bad news for life on a terrestrial planet in another solar system?
What will be an ideal response?
The coefficient of static friction for the tires of a race car is 0.950 and the coefficient of kinetic friction is 0.800. The car is on a level circular track of 50.0 m radius on a planet where 
compared to Earth's 
. The maximum safe speed on the track on the planet is ____ times as large as the maximum safe speed on Earth.
A. 0.250 B. 0.500 C. 1.00 D. 2.00 E. 4.00
A resistor R = 0.07 ?, an inductor L = 35 mH, and a capacitor C = 45 ?F are connected in series to form an LRC circuit
Starting at t = 0, when the capacitor is fully charged, how many oscillations are completed in the circuit by the time the amplitude has decreased to half it maximum? A) 206 B) 88 C) 187 D) 25 E) 44