Question

4. How did ancient people travel through water?
5. Give an example of periodic motion.
If you are sitting in a moving car, are you at rest or in a motion
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Answer 1

Answer:

4. They could find groundwater rushing by in rivers, or bubbling up from underground through a spring. They could also dig deep into the earth to find water. “What people did way back in ancient times is they looked for water that was flowing or they used groundwater,” Padowski said. ... We boil water to kill any bacteria.

5.Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.