Which answer is incorrect? A base is a substance that, when dissolved in water,
a. reacts with an acid to neutralize its properties.
b. reacts with many metals to liberate O2.
c. changes the color of litmus dye from red to blue.
d. conducts electricity.
b
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Stars much more luminous than the Sun have
A) narrower habitable zones, decreasing the odds of finding habitable planets and lifetimes too short for life to appear B) wider habitable zones, increasing the odds of finding habitable planets but lifetimes too short for life to appear C) narrower habitable zones, decreasing the odds of finding habitable planets but much longer lifetimes allowing life to appear and evolve D) wider habitable zones, increasing the odds of finding habitable planets and much longer lifetimes allowing life to appear and evolve
Neptune has a single, broad ring that is extremely thin
Indicate whether the statement is true or false
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 helicopter descends from a height of 600 m with uniform negative acceleration, reaching the ground at rest in 5.00 minutes. Determine the acceleration of the helicopter and its initial velocity