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.
Temperature is measured in Fahrenheit and Celsius scale. Fahrenheit is a temperature scale used mostly in the USA. The difference between the freezing point and boiling point of water is 180 fahrenheit degress where the boiling point of water is 212 Â°F and the freezing point of water is 32 Â°F.This means that one degree on the fahrenheit scale is 1/180th of the difference between the freezing and boiling point of water.ahrenheit to Celsius Formula. The formula to convert Fahrenheit to Celsius is given by. The Formula to convert Celsius to Fahrenheit is given by. The kelvin to Fahrenheit formula is given by. The degree Celsius is denoted as oC and degree Fahrenheit is denoted as F.