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If a car is left in the sun, the interior of the car will get warmer than the outside air. (This assumes the windows to the car are left closed.) This is true whether it is a warm day or a cold day.
The cause of this is the same thing that causes global warming, "the greenhouse effect." The phrase "greenhouse effect" was in existence long before the worldwide discussion of global warming became popular because the effect really does happen in a greenhouse.
In a car and in a greenhouse, the sunlight enters through glass. Sunlight contains energy. Much of the sun energy passes through the glass. The sunlight is then mostly absorbed by the material inside the car where it is converted into heat. The heated material then heats the air.
The energy in sunlight is large. If the sun is directly overhead, it supplies 1,000 watts per square meter to the Earth's surface. That is ten times the heat given off by a regular light bulb. A portable electric space heater of the type used in houses in winter typically puts out 1,000 to 1,500 watts.
The amount of glass is many cars is large enough to allow in a significant amount of the sun's energy. That is why a closed car on a warm day can get too hot for humans (or pets) in a matter of minutes.
On a cold day in winter, the sun is not directly overhead and less energy is likely entering a car, but even a fraction of a kilowatt will create a noticeably warmer environment inside.
Aside: One should not confuse the actual warming of the car in a cold environment with the feeling of warmth. A warmer feeling that might result from the stillness of the air and decreased heat loss through the skin inside the car compared to the more rapid heat loss at the same temperature due to wind outside the car.
What else can I help you with?
What is Warm start and cold-start?
warm start is when your car has already been started an is hot, a cold start is wheen you have just started the car for the first time of the day, or month....
Why can it get very warm in car that sits in the sun on a cold day?
The reason why it still gets hot in a car on a cold day when the sun is out is because the cold air cannot get inside the car to keep it cool. But the sun is able to shine right through the window and heat it up.
On a cold day why does moisture gather on the inside window of a warm car?
It's condensation caused the variance of temperatures.
Do you need to warm your car?
if you are in cold weather you do.
Why are your fingures warm on such a cold day?
because humans are warm blooded
What are the release dates for A Warm Day Comes After a Cold Winter - 1995?
A Warm Day Comes After a Cold Winter - 1995 was released on: USA: 1995
Why is your house warm on a cold day?
Your house may be well insulated, or your heater is on because it is a cold day
Are silkworms warm or cold blooded?
Yes silkworms are cold blooded and tend not to do alot in the day so the do not need warm blood
Why is house warm on a cold day?
Your house might be warm on a cold day because inside the walls there might be something to insulate or keep all the wamth from going away.
When do you expect high humidity during warm day or cold day?
High humidity is typically expected during warm days because warm air can hold more moisture than cold air. As warm air rises, it cools and the relative humidity increases, resulting in higher humidity levels. Cold days generally have lower humidity levels because cold air holds less moisture.
What is a metaphor for kindness?
"Kindness is a warm embrace on a cold day."
Why do the windows on a car steam up on a cold wet day?
on a wet day the air contains too much h20 in form of vapour in it. since the inside of the car is warm and outside cold, the vapour condenses on the outer side of glass to liquid form.this water on glass we observe as steaming of glass.
