What is the most common way of weighing a horse

Hello! 

Most people these days will use a weight/height tape. THey put the tape around the girth/heart girth of the horse and calculate it's weight. Or they could use a forklift and a sling to carry the horse while a weight is attacked. Much like a fishing weight. However, the tape measure is used most often. 

I hope this helped!

I am, yours most sincerely,
SuperHeleprThingy

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass