Physics1) A rocket engine ejects 60kg of hot gas at a speed of 90m/s in 20s.Find:a) The change in momentum of the hot gas and b) The thrust(in Newtons)of the engine.2) What is the radius of the circle in which a 240-kg motorcycle and rider are travel

Physics1) A rocket engine ejects 60kg of hot gas at a speed of 90m/s in 20s.Find:a) The change in momentum of the hot gas and b) The thrust(in Newtons)of the engine.2) What is the radius of the circle in which a 240-kg motorcycle and rider are travel a rocket是什么意思 Rocket rocket how can a rocket fly? 有没有take a rocket A rocket can fly in the 坐火箭是take a rocket还是 fly a rocket?请高手作说明. Going to the moon by rocket means ____(take)a rocket to the moon Long March 3A rocket 中3A 代表什么 My classmate needs a new toy rocket.改为一般疑问句 英语翻译是2010年2月份的 关于中国火箭登月的News Read and translate.Oct.2,2010)BBC NEWS---A Chinese rocket carrying a probe destined for the Moon has blasted into space.A Long March 3C rocket with the Chang'e-2 probe took off from Xic Rocket是什么? BY ROCKET They made a decision to fly the rocket to the moon.(改为同义句） They _______ ________ ________the rocket to the moon. once a boy wanted to have a rocket and launch it to the moon全文翻译 求a rocket to the moon 的 on a lonely night 中文歌词 3Q~ I ___ the Rocket Club two months ago.A.join B.joined C.joins D.joining