Allergy Headache Management and Treatment. 1  For all headaches, identify triggers and avoid them. 2  For relief of sinus headaches, make changes to your home and to your behavior. 3  Control some headaches with nonprescription (over-the-counter) medications.  See an allergist for prescription medications, which may be more effective.
At temperatures below 32 Â° F (0 Â° C), liquid water freezes; 32 Â° F (0 Â° C) is the freezing point of water. At temperatures above 32 Â° F (0 Â° C), pure water ice melts and changes state from a solid to a liquid (water); 32 Â° F (0 Â° C) is the melting point.
The temperature of the ice will continue to decrease until it reaches the same temperature as the outside air which is 20 F. Liquid water has more energy than frozen water. When water freezes it gives up some of the water's energy. This energy that is given up is the latent heat of freezing.