Use the
following formula to find the time meteorites take for a footprint to be
erased:
T = [(Impact
needed of a footprint)(4πr^2)]/[(impact rate)(Area of a footprint)].
Use
the following formula to find the area of a foot:
Area of
a foot = length of foot x width of foot
Substitute
the given values in the above equation to get area of a foot:
Area of
a foot = 25 cm x 10 cm = 250 cm^2
Convert
the radius of moon in kilometers to centimeters.
R =
1738 km = 1738 km (10^5 cm / km) = 1.738 x 10^8 cm
The
time meteorites take for a footprint to be erased:
T = (20)(4
π (1.738 x 10^8)^2) / (25 million / day) (250 cm^2) = 758.78 x 10^16 / 6250 x
10^6 /day = 1.21 x 10^9 days
Therefore,
the time meteorites take for a footprint to be erased is 1.21 x 10^9 days
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Ok, so it definitly isn't "The sun released a strong burst of water vapor" because the sun doesn't have water. I'm not too sure about this one " Water evaporated and condensed to form oceans" but I would say yes. "Materials collided due to strong gravitational forces." Yes. That's how the earth was made. "The ozone layer formed to protect against harmful UV ray exposure." Yes. It acts as a sort of filter so we all don't disintegrate as soon as we step outside (bit of exaggeration but whatever). "Water vapor increased during formation of the early atmosphere." yes. I do hope this helps
-Agarvated
Answer:
this statement is true.
Injuries can be prevented if you follow the rules, use protective equipment, and know the risks of injuries involved in each sport.
injuries can be prevented if we follow the rules and know the risk of injuries because there’s a very famous proverb “prevention is better than cure”.
The north Celestial pole is 42.036 degrees above the northern horizon when I look at it from my front yard.
I don't need to know my latitude to discover that, since I can measure it directly in the sky.
But when I DO look up my latitude, it blows my mind ! It's the exact same number ... 42.036 degrees north ! This can't be just a coincidence. There must be some connection !
(YOU can't use this number. It's different where you live.)