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.
0 degrees Fahrenheit is equal to -17.77778 degrees Celsius: 0 F = -17.77778 C. The temperature T in degrees Celsius (C) is equal to the temperature T in degrees Fahrenheit (F) minus 32, times 5/9: T (C) = (T (F) - 32) Ã 5/9.or. degrees Fahrenheit is equal to -17.77778 degrees Celsius: 0 F = -17.77778 C. The temperature T in degrees Celsius (C) is equal to the temperature T in degrees Fahrenheit (F) minus 32, times 5/9: T (C) = (T (F) - 32) Ã 5/9. or. T (C) = (T (F) - 32) / (9/5).