Question

8. You find a 10,000,000 year old rock 2,500 km away from the nearest seafloor spreading center, how fast has the plate been moving since its formation? Give answer in cm/yr. (Hint: 1 km = 100,000 cm)

Answer 1

`7.93x10^(-7)cm/s`

Step-by-step explanation:

Hello,

In this case, the motion velocity is determined by the equation:

`v=(distance)/(time)`

In such a way, we first develop the units conversions for the required units:

`time=10000000year*(365day)/(1year) *(24h)/(1day) *(3600s)/(1h)=3.1536x10^(14)s`

`distance=2500km*(100000cm)/(1km)=2.5x10^6cm`

Now, the velocity is computed as shown below:

`v=(2.5x10^6cm)/(3.1536x10^(14)s) =7.93x10^(-7)cm/s`

Best regards.

Answer 2

You find a 10,000,000 year old rock 2,500 km away from the nearest seafloor spreading center. The plate has been moving since its formation by (2,500 km)(100,000 cm/1 km)/(10,000,000 yr).so the plat has been moving equal to 25 cm per year since its formation.