Delay what is the required mass ratio to achieve an exhaust velocity of 2.455 km/s with a specific impulse of 294 seconds? choose one. a. 2.34 b. 2.12 c.3.12 d.5.11 e. 4.33

What acceleration is produced when a 3,000-n force acts on a 1,200-kg car? ignore the friction

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation

What happens to rock when acid reacts with it?