If a machine is doing 500 j of work with 75 watts of power, how long did it take to complete its task?

It takes 6.67 second to finish the task by the machine.

Explanation:

Given that,  

Work done by the machine (w) = 500J

Power generated by  the machine (P) = 75 watt  

The dimension of power is energy divided by time. The "SI unit" of "power" is the "watt" (W), which is equal to "one joule per second" .

Calculate the time for the given work and power.

Time = 6.67 second

6.67 second long did it take to complete its task.  

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.