00:01
For this problem, we are thinking about earthquakes and seismic activity.
00:07
We're told in part one that the atlantic ocean is spreading at a rate of 2 .1 centimeters per year.
00:21
And we want to know how long has it taken then for it to reach its present width, which is about 5 ,000.
00:31
Kilometers.
00:34
So in order to figure that out, we can very easily just divide these two numbers, but i want to make sure that they're in the correct units first.
00:44
So i'm going to convert from centimeters to meters per year.
00:49
So that is a result of 0 .021 meters per year.
00:54
And then from kilometers to meters and we end up with five times 10 to the six.
01:02
Meters.
01:03
And so now to figure out how long it's going to take, we would just divide our 5 times 10 to be 6 meters over our 0 .002, not 2 zeros.
01:17
There should just be 1 .0 there.
01:19
Sorry about that.
01:21
0 .0 to 1 meters per year.
01:31
And when you divide, you would end up with a result of 2 .0 .0 .1 meters per year.
01:34
And when you divide, you would end up with a result of 2 .0 .0 .2 .0 .5 meters .5 .5 per year...