Calculate the average speed (in km/h) of a rocket that travels 4000km in 30 minutes

You notice a very one-dimensional-thinking snail crawling along one rail of a railroad track. naturally, you remove it to a safer place. but before you do, you observe it as it moves from position xi = -92.9 cm to position xf = -64.9 cm along the rail, as measured from a point where one rail abuts the next. what is the snail\'s displacement δx in centimeters?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2