за какое время мяч,начавший своё падение,пройдёт путь 19,6м?как движется тело при свободном падении?

 

Допишіть продукти реакцій,поставте коефіцієнти: а)SO2+Ba(OH)2= б)SrO+H2O= в)CaO+P2O5= г)CO2+LiOH=

вычислите массу (н.у.) 11,2 мл кислорода...помогите пжт.вообще не понимаю

поставьте глагол в нужной форме.Mr. and Mrs. Lucas 41______ (go) to the cinema. And I 42______ (sit) with Jenny. They 43______ (be) away for two hours now. This is the first time I 44_____ (ever/ask) to baby-sit and I 45_____ (not find) it easy. Jenny is seven. She is very nice, but she 46_____ (be) a real nuisance tonight. I can’t make her 47______ (go) to bed. I had nothing 48______ (do) but let her 49 ______ (do) what she 50 ______ (want). I can’t wait for her parents 51 ______ (come); This is what happened next: Mr. and Mrs. Lucas 52 _____ (come) home at 11: 30. They 53 ______ (have) a great time. They saw Jenny 54 ______ (sit) on the floor, playing with her toys. “55______ (be) you all right?” her mother asked her. “I hope you 56______ (not be) very naughty. Where is Angela?” “She 57 ______ (sit) at the kitchen table. She 58 ______ (sleep) for the last two hours. She 59 ______ (be) a very good girl. I 60______ (have) a lovely time.”