You walk to the north, then turn 60° to your right and walk another How far are you from where you originally started?
A) 68 m
B) 39 m
C) 75 m
D) 35 m
A
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If the carbon isotope evidence does indicate life 3.85 billion years ago, it suggests that life must have been widespread at that point
Indicate whether the statement is true or false
An organ pipe is open at both ends. The frequency of the third mode is 320 Hz higher than the frequency of the second mode. If the speed of sound is 345 m/s, then what is the length of the organ pipe?
A. 64.0 cm B. 62.6 cm C. 57.9 cm D. 53.9 cm E. 50.3 cm
A star on the upper edge of the main sequence denotes that:
A) it has exhausted nearly all hydrogen in its center. B) it has reached stability for the first time. C) it is in the zero-age main sequence. D) it is converted into a brown dwarf.
If all of the mass in the galaxy were concentrated at its center, then orbital velocity would be high near the center and would decline away from the center
Indicate whether the statement is true or false