A seismograph could register P but not S waves from an epicenter on the opposite side of the Earth
Indicate whether the statement is true or false
TRUE
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As an airplane flying with constant velocity moves from a cold air mass into a warm air mass, the Mach number
1.increases. 2.decreases. 3.remains the same.
As viewed from underwater, at what angle from the vertical does the Sun appear to set?
A) 0° B) 90° C) 49° D) 41° E) 45°
According to the standard model of elementary particle physics, there are six flavors of quarks, each of which comes in three colors
Indicate whether the statement is true or false
Observations show that elements with atomic mass numbers divisible by 4 (such as oxygen-16, neon-20, and magnesium-24 ) tend to be more abundant in the universe than elements with atomic mass numbers in between. Why do we think this is the case?
A) The apparent pattern is thought to be a random coincidence. B) Elements with atomic mass numbers divisible by 4 tend to be more stable than elements in between. C) At the end of a high-mass star's life, it produces new elements through a series of helium capture reactions. D) This pattern in elemental abundances was apparently determined during the first few minutes after the Big Bang.