temperature!
A good thermometer, a thermocouple, a thermoresistance, a pyrometer, etc.
endothermic is when something changes from to hot to cold and ectothermic is when something changes from cold to hot.
How hot or cold something is.
Thermometer
Thermometer
Heat flow determines how hot or cold something feels when you touch it.
When we call something hot we mean that its temperature is high, and when we call something cold we mean that its temperature is low.
When something gets hot it expands and when it gets cold it'll contract
Thermal conductivity most determines how hot or cold something feels when you touch it. The nerve endings in your skin determine what is hot and cold when you touch it.
With a thermometer.
Temperature.
No.
Something is hot when it has a high temperature, while something is cold when it has a low temperature. Temperature is a measure of the average kinetic energy of the particles in a substance.