No, dew is liquid water and it forms when the air temperature drops sufficiently that the air can no longer hold all its water vapour. This must be above freezing point. Of course the same argument applies when the temperature does drop below zero, but then we get ice crystals instead of water drops, and we call it frost.
At its outer edge, where it meets the atmosphere, the temperature of the crust of the Earth is the same temperature as the air. So, it might be as hot as 35 °C in the desert and below freezing in Antarctica.
If the temperature is below freezing outside, there is no need to run the air conditioning. The heater does not use the same set up as the air conditioning. This may be a built in feature of the car so the compressor does not completely freeze up. As air conditioning is running, freon passes through the compressor, making it quite cold internally.
capacity and specific humidity are the same
The word "cold" is already an adjective, since it can describe a noun: We are having cold temperatures this week. (It tells what kind of temperature.) There is cold air coming in through the window. (It tells what kind of air.) But it should be noted that the word "cold" can also be a noun, meaning an illness where you sneeze and cough.
Removing heat from the air will lower its temperature.
ground temperature below freezing, and air temperature slightly above freezing.
Where air planes fly, the temperature is below freezing.
When the temperature is below freezing, moisture in the air will crystalize into snowflakes.
Not as long as the air temperature remains below freezing.
Yes, it is possible for the dew point to be below freezing. Dew point is the temperature at which air becomes saturated with moisture and condensation forms. If the air is very dry, the dew point can be below freezing, meaning that the air is not saturated with enough moisture for condensation to occur at temperatures above freezing.
Snow forms when the atmospheric temperature is at or below freezing and there is enough moisture in the air. But the temperature at the ground level may be warmer, sometimes above freezing.
Generally, your sense of smell should still function when the air temperature is below freezing. However, extremely low temperatures can affect the ability of odor molecules to disperse in the air, potentially reducing your ability to detect smells.
The Tall Mountains Block The Cold Air
When there is a large concentration of water in cloud formation, when the air temperature is below freezing.
snow
frost
The temperature on a frosty day can vary, but it is typically below freezing, around 32 degrees Fahrenheit (0 degrees Celsius) or lower. Frost forms when the air temperature is below freezing and moisture in the air freezes on surfaces like grass or windows.