How does an earthquake of magnitude 7.7 compare in intensity with an earthquake of magnitude of 3.1 on the richter scale?

Magnitude 7.7 is 39811 times larger in amplitude compared to magnitude 3.1 .

Step-by-step explanation:

Magnitude scale doesn't use linear scale but uses base 10 logarithmic scale.

For example, if you go from magnitude 4 to 5, increase in amplitude is 10 times and not 1.

This is calculated by doing (10 ^ 5 / 10 ^ 4 ) = 10.

Let's move to the question.

( 10^7.7 / 10^3.1 ) = 38911

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.