As long as the road is straight and his speed
doesn't change, his acceleration is zero.
Answer: Atoms are electrically neutral because they have equal numbers of protons (positively charged) and electrons (negatively charged). If an atom gains or loses one or more electrons, it becomes an ion.
Answer:
Some planets have seasons some don't bc of the distance from the sun some of them are too cold or too hot to have seasons
Seems to me that true, observational astronomy began with Tycho Brahe, and after him came Kepler, Newton, Halley, Herschel, all before 1800. So the statement is false.