Based on the strength of the magnetic fields they produce, arrange the solenoids from strongest to weakest

C, D, B and A.

Explanation:

Electromagnet in option C is strongest because it has an iron core and the largest current as compared to other solenoids, following by D and then B whereas solenoid A is the weakest because of the absence of an iron core and has the smallest current. Solenoid having iron core is the strongest solenoid because the core produces more strong magnetic field as compared to no iron core.

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the answer to your question would be something called hertz. the unit of measurement called a hertz, which is one cycle per second, is used to measure clock speed. within one cycle, your computer processes, refreshes, or updates itself to the changes that it is going through. in the case of computer clock speed, one hertz equals one tick per second. the clock speed of computers is usually measured in megahertz (mhz) or gigahertz (ghz)