Delivery services are a popular dining option with U.S. consumers, as a November 2016 survey found that 20 percent of respondents use food delivery at least once a week. Facts on the food delivery industry in the U.S. Embed Top Facts.
The running martingale has only one purpose, which is to prevent the horse from throwing its head too high when taken by the bit, especially when taken back. This is why it was primarily used on green horses that did not know how to respond to the bit.
What is the purpose of a current limiting resistor in a circuit? To limit the amount of current that flows through the circuit. There might be some components in the circuit that would be damaged by too much current.