a student carries a 0.5kg water balloon from the first floor to the fourth floor, a distance of 15m. if she drops it out the window, how much kinetic energy will it have when it reaches the first floor?

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market