Answer:
Friction opposes motion.
Explanation:
If there is relative motion, the frictional force is the kinetic force of friction.
Explanation:
Tremendous heat and pressure within the earth cause the hot magma to flow in convection currents. These currents cause the movement of the tectonic plates that make up the earth's crust.
B. Half a centimeter per year
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Answer:nevis design because it has the most surface area
Explanation:
because it has the most surface area
The frequency of the wheel is given by:

where N is the number of revolutions and t is the time taken. By using N=100 and t=10 s, we find the frequency of the wheel:

And now we can find the angular speed of the wheel, which is related to the frequency by: