A disk is suspended by a nail such that it pivots in a vertical plane about a point on the edge of the disk. If the disk's radius is 25 cm, what is the period of oscillation?

A. 0.71 s
B. Need the mass of the disk to calculate the period.
C. 1.2 s
D. 1.51 s


C. 1.2 s

Physics & Space Science

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What do we mean by gravitational time dilation?

A) It is the idea that time runs slower in places where gravity is stronger. B) It is the idea that clocks run slow for people moving at high speed past you. C) It is the idea that everyone measures time differently, depending on his or her reference frame. D) It is the idea that clocks run faster in stronger gravitational fields.

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It is expected that only elliptical galaxies have a massive black hole at their center.

Answer the following statement true (T) or false (F)

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