Tectonic plates are large segments of the Earth’s crust that move slowly. Suppose that one such plate has an average speed of 4.0 cm/year. (a) What distance does it move in 1 s at this speed? (b) What is its speed in kilometers per million years?
Solution 9PE: Step 1 of 4 (a) The conversion relation from year to second is, Comment 1 year = 1 year (365dat)( 24 hou)( 60 mi)( 60s ) 1 year 1 day 1 hour 1 min = 31536000s Step 2 of 4 Distance moved by an object in term of speed and time is given as: Distance = speed × time Therefore, Distance covered by plates = 1 year (4 cm)102m = (31536000s(1s) [ (1 yea()1 yeat = 1.3 × 10 m Hence, the distance covered by tectonic plates in meters is . Comment
Textbook: Physics: Principles with Applications
Author: Douglas C. Giancoli
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