Answer: You have to heat the windscreen in order to make the water dissolve into the air again.
When the screen gets too cold, the air directly around it inside the car will also be cooled. The maximum degree of humidity of air depends on its temperature, and the cooler it gets, the less water it is able to contain. Therefore water that can not dissolve in the air will condensate - on your screen. Heat it up and it will dissolve again.
Answer: I am not trying to be inappropriate but the BEST way to heal anything faster is steroids. I am not a user and advise against it, but from my research steroids does wonders for the healing process, this is one reason why so many athletes are users. They want to be back on the field as soon as possible for a chance at the ring. But they are illegal and have horrific side effects. Maybe a visit to your MD for some sort of cream would be best.
Answer: A virus causes the common cold. You do not catch it by working in the cold and rain. However, working in the cold and rain can put stress on your body and on your immune system making you more susceptible to infection from viruses.
Answer: Our body temperature is high then cold water so when it comes in contact with our body energy in the form of heat is transferred from body to water so it decreases our body temperature and we feel cold.
Answer: In a chemical ice pack you have to break some sort of seal so that two chemicals react. The chemicals that are used are chosen because when mixed they create an endothermic reaction causing it to feel cold
Answer: When the baroreceptors detect the loss of pressure, they try to return pressure to a homeostatic level. In order to do this, they constrict the blood vessels, which raises the pressure by having the same amount of blood within a smaller "container". The capillaries near the skin will aid in this by restricting flow, causing the skin to be cold and clammy. The baroreceptor reflex also raises the heart rate, which also has the affect of raising blood pressure.
Answer: Answer: Sweat is hypotonic in nature. Hence, when you sweat, as you say, you lose a lot of water and a little bit of salt. So the remaining fluid in your body has more salt relative to water as compared to the start i.e. to say, your blood is now hypertonic. However, this change is quite minimal unless the sweating gets excessive.