Tectonic plates are large segments of Earth's crust that move slowly. Suppose one such plate has an average speed of 4.0 cm/yr. (a) What distance does it move in 1.0 s at this speed? (b) What is its speed in kilometers per million years?

(A)

(B)

Explanation:

We have given speed is 4 cm/year

We know that 1 m = 100 cm

And 1 year =

So speed in

(A) Time is given t =1 sec

We have to find the distance

Distance is equal to , distance = speed × time =

(B) Now we have to find the speed in km/million year

As 1 km = 1000 m

And 1 m = 100 cm

So 1 km = 100000 m

So speed in km/million year will be

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it