The interstellar clouds called molecular clouds are ________

A) clouds that are made mostly of complex molecules such as carbon dioxide and sulfur dioxide
B) the clouds in which elements such as carbon, nitrogen, and oxygen are made
C) the cool clouds in which stars form
D) the hot clouds of gas expelled by dying stars


C

Physics & Space Science

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A trapeze artist, with swing, weighs 700 N; he is being held to one side by his partner so that the swing ropes make an angle of 40.0° with the vertical. In such a condition of static equilibrium, what is the tension in the rope?

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Two objects, one less massive than the other, collide elastically and bounce back after the collision. If the two originally had velocities that were equal in size but opposite in direction, then which one will be moving slower after the collision?

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Physics & Space Science