Since blood production requires iron, you should eat iron-rich foods for two weeks before your appointment. This will help you have strong blood for donation and help you better recuperate after your donation. Iron-rich foods include spinach, whole grains, fish, poultry, beans, organ meat, eggs, and beef.
To calculate the change in temperature, subtract the initial temperature from the final temperature. Example: 84.2 degree Fahrenheit - 41 degrees Fahrenheit = 43.2 degrees Fahrenheit. The temperature from morning to afternoon changed by 43.2 degrees Fahrenheit.
Temperature is a measure of the average kinetic energy of a substance, typically expressed in Kelvin by astronomers. Kelvin is a unit not expressed in degrees as in Farenheit or Celsius, so the proper denotation, for example, is 25K not 25 degrees K. In outer space, temperatures vary greatly depending on exposure to the kinetic energy in the form of radiation.