Quite a lot, actually.
Head gasket
You lose most of your body heat through your head. This is why cold-weather places often have extreme solutions to keep the head warm such as a scarf, scull cap, or fur headresses.
The most body heat is lost through the head, followed by the hands and feet.
There are a great many things that gain and lose heat. Metals for example gain and lose heat much more quickly than gasses.
The majority of body heat is lost through the head, as it has a high surface area and is often left uncovered.
In cold water, the body areas that lose heat the most are typically the head, neck, and extremities (hands and feet). The head is particularly vulnerable due to its large surface area relative to its volume, leading to significant heat loss. Additionally, the extremities lose heat rapidly because they have a lower blood flow compared to the core. Maintaining warmth in these areas is crucial to prevent hypothermia.
a burnt valve looks like a wide crack in a valves' head. when a motor runs too lean, the cylinders heat up too much, causing the head of the valve to heat up faster than it can dissipate the heat, causing the valves' head to crack. once the valves' head starts cracking or melting away, you lose compression in that cylinder, and the engin will vibrate and it may not idle at all.
to much heat
It will lose its magnetic charge.
1 quart each hour
While the idea that we lose most of our body heat through our head is a myth, not wearing a hat in cold weather can still contribute to heat loss. The amount of heat lost through the head will depend on factors like temperature, wind speed, and individual metabolism, but wearing a hat can help maintain body temperature and prevent excess heat loss.
You lose so much hair when you shampoo is because your old hair gets washed away from your head