The main reason ice blocks became unpopular for cooling food was

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

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter