A glacier moves with a speed of 42 nm/s.

How many years would it take for the
glacier to move 0.78 km?
Answer in units of yr.

To find the time it would take for the glacier to move a distance of 0.78 km, we can use the formula:

Time = Distance / Speed

First, we need to convert the speed from nanometers per second (nm/s) to kilometers per year (km/yr):

1 km = 1,000,000,000 nm
1 year = 31,536,000 seconds

So, the speed of the glacier would be:

42 nm/s * (1 km/1,000,000,000 nm) * (31,536,000 s/1 year) = 1.33 km/yr

Now, we can use the formula with the converted speed:

Time = 0.78 km / 1.33 km/yr = 0.586 yr

Therefore, it would take approximately 0.586 years for the glacier to move a distance of 0.78 km.