The main chemical building blocks of life, carbon, nitrogen, oxygen, and iron were formed
A) inside interstellar gas clouds during star formation
B) in the center of the Earth and then ejected onto the surface via volcanism
C) in the nuclear burning cores of stars and then ejected into space when they died
D) in the Big Bang that created the universe
C
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If a 1H nucleus, a 2H nucleus, and a 3H nucleus all had the same momentum, which one has the greatest de Broglie wavelength?
a. 1H b. 2H c. 3H d. All three have the same de Broglie wavelength.
An object moves with constant speed through a fluid. For a fixed geometry and fluid density, if the viscosity of the fluid increases then the speed at which flow becomes turbulent
A) increases. B) remains the same. C) decreases. D) could increase or decrease depending on the shape of the object. E) could increase or decrease depending on the value of the fluid density.
In what way could the Huygens probe be considered a first?
What will be an ideal response?
What keeps water frozen on Mars?
a. The constant subzero surface temperatures b. The low atmospheric pressure of the planet c. The distance between Mars and the Sun d. The relatively quick rotation period e. The negligible axis tilt of the planet