A student plots data for the velocity of a body versus the time on a graph. The area under the curve on the graph may be identified as
A. average velocity.
B. distance.
C. average speed.
D. acceleration.
Answer: B
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Counting only the material between us and the galactic Center, we measure a mass of ________ billion Suns
Fill in the blank(s) with correct word
Mass on a Spring: A 0.250-kg stone is attached to an ideal spring and undergoes simple harmonic oscillations with a period of 0.640 s. What is the force constant (spring constant) of the spring?
A. 2.45 N/m B. 12.1 N/m C. 24.1 N/m D. 0.102 N/m E. 0.610 N/m
Can two pool balls, both of them moving, have a total momentum of zero?
A) No, because any moving object has momentum. B) No, because they both have energy. C) Yes, if they are moving in opposite directions, both with the same speed. D) Yes, but only at the instant that they collide. E) Yes, if they are both moving outward from the same point.
An interferometer reduces the resolving power of a telescope
Indicate whether the statement is true or false