A fan blade is rotating at 90 Hz when someone switches the fan to the next lowest setting. As a result, the blade uniformly slows down to 60 Hz in a time of 5.0 s. Through how many revolutions does the fan blade rotate between settings? a. 275 cycles b. 375 cycles c. 325 cycles d. 425 cycles e. 475 cycles

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Q: Convert the following to basic SI units or a combination of basic SI units:

A: The length in British unit is

Proper Length

The theory of special relativity explains the connection between space and time to objects that move in a straight line at a constant speed. The objects move at the speed of light. When an object approaches light speed, its mass is endless and cannot move faster than light. The most crucial postulate of Einstein's special relativity is that the laws of nature do not change in each frame of reference.