At what temperature the kelvin scale will be double of Fahrenheit scale?

Never.

Explanation:

32F is 0C, is 273k. 0F is 255k. Since Fahrenheit degrees are smaller than Celsius or kelvin, the Fahrenheit numbers will go up faster than kelvin numbers will. Below 0°F it would make no sense, since a negative number cannot be twice a positive number. Using mathematics you can show that the lines would cross somewhere below 0k, but that temperature does not exist

explanation: in any substance/object, the particles inside it (atoms/molecules) constantly move in random directions and with random speeds (this motion is called brownian motion). as a result, the particles have some kinetic energy (which is proportional to the temperature of the substance).

explanation:

have a great day!

this is a good question! i'll do some research and come back when i have the answer!