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Because freezing is a warming effect. Heat is released as the liquid turns to solid. The water freezes at 0 degrees C (32 deg F), liberating its latent heat, thereby holding the temperature of the surface of the fruit at 0 deg C for a little bit longer than it otherwise would. The juice inside the fruit freezes at less than 0 deg C because of all the stuff dissoved in it. So the water staves off freezing for a few hours, and with any luck the sun comes up and warms things up before the whole orchard freezes. It's also possible to warm up the area with nothing but a fan. Radiation off the surface of the earth is the principle cooling mechanism on a clear night, so the surface air is often much colder than the air just a few meters up. So a big fan can stir up the air, bringing down the warmer air aloft, preventing the fruit at the surface from freezing. None of this works when it's really cold, just when it's a few degrees below freezing for a night or two.
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Is frost an element?
No. Frost is frozen water. Water is a compound.
How is heat of fusion used to protect against frost damage?
If an orchard is threatened by frost because of a sharp dip in temperature, we can turn on the sprinklers to warm the orchard. Two things are at work here. First, ground water is going to be cold, but not nearly as cold as air at freezing. Water at 45 degrees will release heat energy into the blooms of the fruit, which are sitting in air at just above freezing. It is not uncommon in orchards to be able to lift the temperature a couple of degrees by turning on the pumps and sprinklers. Water collecting on the blooms might still freeze, but as liquid water changes into solid water (ice), it give up energy to do so. This is the heat of fusion (or standard enthalpy of fusion), and the heat released when water changes state from liquid to solid will "go" somewhere, and the blooms will collect it. This helps stave off frost damage.
Is frost a gas?
No. Frost is ice, which is water in the solid state.
Sometimes water vapor on a surface may freeze without first becoming liqiud water what forms when this ocors?
When water vapor condenses on particles in the air, the water molecules liquefy and become liquid water.
Does water contract when it freezes causing frost wedging?
No, frost wedging is caused by water expanding, not contracting.
In mango orchard the water table is about one and half feet. How it can be manage?
now days the water table of soil is increase. In this land mango orchard is present. how mango can manage this type of soil
Which property of water makes frost wedging possible?
Water expands as it freezes is the property of water that makes frost wedging possible. Frost wedging is sharp cornered boulders on bare mountain tops.
What has the author P J O'Gara written?
P. J. O'Gara has written: 'The raspberry cane blight and how to control it' -- subject(s): Raspberries, Diseases and pests 'Water core of apple' -- subject(s): Apples, Diseases and pests 'The prevention of frost injury in the orchards of the Rogue River Valley, Oregon' -- subject(s): Plants, Frost, Effect of temperature on 'The protection of orchards in the Pacific Northwest from spring frosts by means of fires and smudges' -- subject(s): Fruit, Frost protection
What is frozen dew?
Words that work are frost, hoar-frost, or rime.
How does water vapor become frost?
When water vapor meets a surface that is below the freezing temperature and below the dew point, it turns into frost.
Is frost or ice an element?
No, frost and ice are both forms of water (H2O), which is a compound, not an element.
Why does path lift in the frost?
frost heaves due to water under path freezing and expanding.
