During which step in cosmic evolution did diverse life forms begin to arise?
A) particulate evolution
B) stellar evolution
C) chemical evolution
D) biological evolution
E) cultural evolution
D
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The vast majority of stars near us would fall to the bottom right on the H-R diagram
Indicate whether the statement is true or false
A block pulled to the left with 15 N and to the right with 5 N at the same time experiences a net force of
A) 5 N. B) 10 N. C) 15 N. D) 20 N.
Potential: If it takes 50 J of energy to move 10 C of charge from point A to point B, what is the magnitude of the potential difference between points A and B?
A. 500 V B. 50 V C. 5.0 V D. 0.50 V
An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force on the spacecraft is directed
A) toward the asteroid. B) away from the asteroid. C) toward the Sun.