How long does it take for coolant to cycle through a motor?

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

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

What are the applications of electromagnetic waves