11) When sodium metal is subjected to violet light, it causes the photoelectric effect. However, red light does not affect the sodium. Explain this phenomena.

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8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.