Why do you think the United States continues to use the inch-pound system and not the metric system?
huh? what does this mean? Do you mean how much voltage can a piece of rubber hold off? It depends on the thickness and other conditions. to were it can kill you? Don't know what this means. I'll say that the breakdown voltage of a rubber sheet will be much higher than a lethal voltage, if the sheet has any thickness at all. PS, very few things are made of rubber today. Most are actually plastic like latex. .
Lol, If that's all your wife is worth then sure buy her card from 7/11, why not throw in a slurpee to quench her thirst. And then do the right thing by replacing her $500 manicure kit with a gift card to the spa