In comparing the Terrestrial worlds, which planet is most similar to Earth's moon?
a. Mercury
b. Venus
c. Earth
d. Mars
e. Uranus
a
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Why do scientist refer to Earth's mantle as a plastic? a. The mantle has the properties of a solid, but can flow under pressure. b. The mantle has the mixed properties of a solid and a liquid
c. The mantle frequently shifts between its states of matter. d. The mantle is a softer solid as it approaches the core. e. The mantle has the properties of a liquid, but is limited in its movement.
What is the ionization energy of singly ionized helium?
A) 54.4 eV B) 13.6 eV C) 27.2 eV D) 6.80 eV E) 36.4 eV
The force required to move a 90.0 kg object in a 85.0 m circle at a constant speed of 8.10 m/s is
a. 0.0 N b. 69.5 N c. 0.77 N d. 8.58 N
A 5-mol ideal gas system undergoes an adiabatic free expansion (a rapid expansion into a vacuum), going from an initial volume of 10 L to a final volume of 20 L. How much work is done on the system during this adiabatic free expansion?
a. -50 J c. zero b. -10 J d. +50 J