What are the ranges of the strong and weak forces?

As you point out the range of the electromagnetic and gravitational forces goes a 1/r2. In the technical jargon it's called an infinite range. read more

In the case of nuclear, or strong forces, the range is about the size of a medium sized nucleus, 10-15 meters In the case of the weak force it's much smaller, about 10-18 meters. These latter two forces fall off much more rapidly than 1/r 2, exponentially or worse. read more

Strong forces has a very small range, will be felt beyond the order of 1 fm (femtometer or 10^-15 m), while the range of weak force is smaller than 1 fm and is 10^-7 weaker than the strong force. read more

The Weak Force. One of the four fundamental forces, the weak interaction involves the exchange of the intermediate vector bosons, the W and the Z. Since the mass of these particles is on the order of 80 GeV, the uncertainty principle dictates a range of about 10-18 meters which is about 0.1% of the diameter of a proton. read more