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

Physics & Space Science

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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.

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science