Atomic bomb tests demonstrated which aspect of star formation?
A) A shock wave surrounding and compressing a molecular cloud.
B) The ignition of fusion that changes a protostar to a star.
C) A protostar's movement on the Hayashi track.
D) The fragmentation of a molecular cloud.
E) A shock wave pushing a molecular cloud from one side.
A
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A child pulls on a wagon with a horizontal force of 75 N. If the wagon moves horizontally a total of 42 m in 3.0 min, what is the average power generated by the child?
A) 18 W B) 22 W C) 24 W D) 27 W
In the context of granulation, convection occurs when hot fluid sinks and cool fluid rises
Indicate whether the statement is true or false
A 50.0-kg block is being pulled up a 15.0° slope by a force of 300 N which is directed 30.0° above the slope. The coefficient of kinetic friction between the block and the slope is 0.200. What is the acceleration of the block?
A) 1.36 m/s2 B) 0.158 m/s2 C) 0.924 m/s2 D) 0.520 m/s2 E) 1.47 m/s2
The critical density must include both matter and ________
Fill in the blank(s) with correct word