Why was the bill of rights added to the constitution?

Technician a says that the sine with dwell (swd) test is used to determine if an electronic stability control system functions normally. technician b says that the esc lamp, called a telltale light, is required to remain on for two minutes. who is correct?

Briefs filed by groups that care about how a case turns out?

How do state and federal courts differ in the united states