Answer:
Spiral galaxies, barred spiral galaxies, and lenticular galaxies have a clearly defined disk component Spiral Galaxies consist of a central bulge and protruding arms. Sometimes, they have two arms that connect in a bar that crosses the center, and this is called a barred spiral galaxy.
Until there's none of it left. Different radioactive isotopes decay at different rates. And a bigger pile of it will last longer than a smaller pile. Without knowing WHICH radioactive isotope you're asking about, and how much of it you started out with, the answer could turn out to be anywhere between 1 millionth of a second and 1 million years.
the cycle of the Moon through all its phases
Explanation:
The cycle of the Moon through all its phases is closely related to the unit of time that humans call month.
It takes 27 days for the moon to complete its orbit around the earth and this is equivalent to a month.
The moon is the earth's natural satellite and it revolves round it in every 27 days.
The moon passes through its different phases within this time period.
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I believe the answer is C) radiation
A bicyclist can ride their bicycle still on the road. Bicycle riders be able to take the public ways which has the similar rights and accountability as motorists and are subject to the same guidelines and protocols. The law says that individuals who ride bikes should ride as nearby to the right side of the road as likely excluding under the following conditions: when passing, preparing for a left go, evading risks, if the lane is too constricted to share, or if oncoming a place where a right turn is approved. In a road which has a bike lane the bicyclists roving slower than road traffic must custom the bike way excluding when creating a left turn, passing, evading hazardous settings, or impending a place where a right turn is approved.