One busy air route across the Atlantic Ocean is about 5500 km. The now retired Concord, a supersonic jet capable of flying at twice the speed of sound was used to travel such routes (speed of sound 343 ). (a) How long did it take the Concord to cover the 5500 km route?

(b) How long did it take a typical subsonic jet flying at a speed of 90% the speed of sound (0.90 x 343 m/s) to cover the same route?

May someone explain how to do this question?

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

Which type of bond is found between the atoms of a molecule? a. metallic b. delocalized electron c. covalent d. ionic