Product timeline. 1  1982 â Diet Coke is introduced, becoming the largest-selling low-calorie soft drink in America. 2  1983 â Diet Coke is introduced in the UK. 3  1986 â Diet Cherry Coke is introduced in American markets. 4  1994 â Diet Coke changes logo. 5  1999 â Diet Cherry Coke changes logo. 6  2001 â Diet Coke with Lemon is introduced.
21Â°C = 69.8Â°F. Use the formula F = 9/5C + 32. To convert from Celsius to Fahrenheit, multiply the number by 9, divide by 5, and add 32. In this instance, 21 x 9 = 189 / 5 = 37.8 + 32 = 69.8. Therefore, 21 degrees Celsius is equal to 69.8 degrees Fahrenheit.se the formula F = 9/5C + 32. To convert from Celsius to Fahrenheit, multiply the number by 9, divide by 5, and add 32.
18 degrees Celsius is 291 degrees Kelvin and 64.4 degrees Fahrenheit. Hot and cold are all about personal opinion. The interior of a human is around 37 degrees Celsius, skin i â¦ s around 34 degrees Celsius.Room temperature is accepted as being 21-4 degrees Celsius but like I said, hot and cold are all about personal opinion, I would class 18 degrees Celsius as 'cool' but I couldn't tell you what hot and cold are for you.he interior of a human is around 37 degrees Celsius, skin i â¦ s around 34 degrees Celsius. Room temperature is accepted as being 21-4 degrees Celsius but like I said, hot and cold are all about personal opinion, I would class 18 degrees Celsius as 'cool' but I couldn't tell you what hot and cold are for you.