The metric system is a decimal system
a. True
b. False
Indicate whether the statement is true or false
True
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Which of the following is not one of, nor follows directly from, Kepler's laws?
A) The orbit of each planet about the Sun is an ellipse with the Sun at one focus. B) As a planet moves around its orbit, it sweeps out equal areas in equal times. C) The force of attraction between any two objects decreases with the square of the distance between their centers. D) A planet travels faster when it is nearer to the Sun and slower when it is farther from the Sun. E) More distant planets move at slower speeds.
What is the minimum energy needed to lift a 1.0-kg rocket to a height of 200 km and to give it a speed of 8.0 km/s at that height? (Neglect air resistance and the small decrease in g over that distance.)
A) 34 kJ B) 34 MJ C) 34 J D) 34 TJ E) 34 GJ
A certain bulb with a resistance of 95 ohms and labeled "150 W" is designated for use in a
A) 120-V circuit. B) 240-V circuit. C) either D) not enough information