START QUIZ #1. An astronomical unit of distance is the average dinstance from the earth to the sun the average dinstance from the earth to the sun light year light year kilometer kilometer none of the above none of the above #2. supersonic speed discribes a speed in excess of mach I.Hypersonic describes the speed in excess mach 4 mach 4 mach 3 mach 3 mach 2 mach 2 mach 5 mach 5 #3. Chronometer is an instrument to measure distance between two points distance between two points heat heat time time electric potential electric potential #4. according to central conference on weight and measures'the unit of length is a kilometer a kilometer an inch an inch a centimetre a centimetre a metre a metre #5. when the velocity of a moving object ia doubled its acceleraction gets doubled acceleraction gets doubled momentum gets doubled momentum gets doubled potential gets doubled potential gets doubled kintenic energy gets doubled kintenic energy gets doubled Next Page >> < Results > - Congratulations. You passed the exam. Sorry You failed this exam. write the exam again.