Bright blue stars are typical of young ________ star clusters
Fill in the blank(s) with correct word
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__________refer to bands in iron meteorite sections due to large metal crystals
A) Widmanstätten patterns B) Oort clouds C) Ice lines D) Condensation sequences
A meteor shower occurs when the leftover debris of a(n) ________ intersects with our atmosphere to produce the beautiful streaks of light.
A. asteroid belt B. star C. planet D. comet
The total momentum of a system will change during a collision unless the ________ force is zero.
Fill in the blank(s) with the appropriate word(s).
What is the agreed-upon direction of rotational velocity?
a. The direction the object is rotating (effectively clockwise). b. In the direction opposite to the way the object is rotating (effectively counterclockwise). c. Along the axis of rotation in the direction your thumb would point if the fingers of your left hand curl along the motion of the spinning object. d. Along the axis of rotation in the direction your thumb would point if the fingers of your right hand curl along the motion of the spinning object. e. Along the axis of rotation in the direction your index finger would point if the thumb of your right hand points along the motion of the spinning object.