Answer:
0.80 m/s
Explanation:
What is the speed of a walking person in m/s if the person travels 1000 m in 20 minutes?
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Answer: Electromagnetic waves with wavelengths just shorter than those of visible light; Ultraviolet rays carry out more energy than visible light because it has a higher frequency. Electromagnetic Waves with wavelengths just shorter than those of ultraviolet rays; X-Rays can penetrate through most matter.
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