Which of these Galilean satellites is most geologically active?
a. Io
b. Europa
c. Callisto
d. Ganymede
A
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In selecting a unalloyed alumina material for a design, it would be expected that the one with the _________density would have the highest tensile strength.
Fill in the blank(s) with the appropriate word(s).
One result of bombardment of the Moon's surface is a layer of broken, pulverized, and powdered rock called
A. regolith. B. maria. C. lunar rays. D. basalt.
Gamma rays are
A) made up of helium nuclei. B) made up of electrons. C) a form of beta radiation. D) rays of light. E) a form of electromagnetic radiation.
When gasoline is burned, it gives off 41 000 J/g of heat energy. If an automobile uses 14.1 kg of gasoline per hour with an efficiency of 23.0%, what is the average horsepower output of the engine? (1 hp = 746 W)
a. 49.5 hp b. 105 hp c. 35.1 hp d. 29.8 hp e. 59.5 hp