Depression and addiction, for example, have several things in common, including: 1  Loss of interest in once-enjoyable activities. 2  Fatigue. 3  Feelings of hopelessness. 4  Reckless behavior. 5  Irritability.
Deflection Temperature Testing of Plastics. The deflection temperature is a measure of a polymer's ability to bear a given load at elevated temperatures. The deflection temperature is also known as the 'deflection temperature under load' (DTUL), 'heat deflection temperature', or 'heat distortion temperature' (HDT).
Specific heat capacity, commonly called specific heat, is the amount of heat required to change a mass of a substance by a certain temperature. It is usually measured by the number of Joules required to raise the temperature of a gram of material by one degree Kelvin (or Celsius). Water has an unusually high specific heat, and the human body is mostly water, meaning that humans can absorb or lose a lot of heat without drastic changes in internal temperature.