Theories are derived directly from observations
Indicate whether the statement is true or false
FALSE
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If you double the length of each side of a cube, its volume increases by what factor?
A. 2 B. 4 C. 6 D. 8
Your ears "pop" when you ascend to higher altitudes because
A) air pressure is greater at higher altitudes. B) air temperature is lower at higher altitudes. C) air pressure is lower at higher altitudes. D) air is dryer at higher altitudes.
In order for the angular momentum of a rotating object to be conserved
A. Net force must be zero B. Net force must be constant, but not equal to zero C. Net torque must be zero D. Net torque must be constant, but not equal to zero
Some globular clusters have three main sequence tracks. This indicates:
A) three different stellar compositions. B) three episodes of star formation, separated by billions of years. C) stars evolve through three different mechanisms. D) the stars were observed from three different telescopes.