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Trees evaporate 900kg of water a day water is raised from roots to the leaves if the average rise of water to be 9m from the ground then how much energy must be supplied per day to raise the water?
Wiki User
∙ 11y ago
That sounds to me like an awful lot of water ... almost a ton, and more than 200
gallons. It must be referring to the aggregate water raised by some substantial
number of trees.
But no matter; the question is still sound.
Energy to lift mass = (Mass) x (Gravity) x (Height) = (900) x (9.8) x (9) = 79,380 joules.
(That's the amount of electrical energy used to operate a 100-watt light bulb for about 131/4 minutes.)
It's also important to note that the process described in the question leaves a
large part of the job incomplete. Raising the water from the roots to the leaves
really doesn't get you anywhere ... If it stopped there, then either the water
would have to drip down out of the leaves in a steady rain, or else the leaves
would have to blow up like little green balloons to hold all that water. Most of
the water that rises from the roots evaporates as soon as it arrives at the
leaves, and that process requires a lot more energy than simply lifting it 9 meters
from the ground.
The latent heat of vaporization for water is listed as 2,257 KJ/Kg. In terms of
lifting water, that's astonishing. It says that the energy it takes to evaporate
some water is enough to lift it 230 kilometers!
Wiki User
∙ 11y ago
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Elements go from the ground state to the excited state if some form of energy is supplied. Otherwise, they stay in the ground state.
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Does the water on the ground evaporate?
Yes, it is a common phenomenon.
What is the term for water does not soak into the ground and does not evaporate?
Runoff
What are the following processes transports on average the most energy from the ground to the atmosphere?
Radiation
Why does water evaporate more slowly from the ground in the wood than the hillside just above it?
Easier to evaporate higher up
How come magnets aren't a source of unlimited energy when the force between them is constant?
When standing in a bus-queue with a constant force between my feet and the ground there is no obvious source of energy, unlimited or finite. If I fall onto my neighbours shopping bag, crushing her eggs, some energy is supplied but it is limited. As soon as my body is flat on the ground there is no more energy to be had. If two magnets are held an inch apart, north opposite south and south opposite north, there will be an attractive force. There is potential energy here, and if the magnets are allowed to come together work will be done, energy supplied. This is not unlimited energy; it stops being available as soon as the magnets jam up against each other. Of course, you can recharge that energy by pulling the magnets apart, but then your muscles will have supplied the energy. The motto of physics, and of the entire universe, is TANSTAAFL. There ain't no such thing as a free lunch.
Does rain evaporate before it reaches the ground in the desert?
Not always, but sometimes.
Why does it rain less in summer?
there is less water in or on the ground to evaporate and form clouds
What is Water that doesn't soak into the ground or evaporate but flows across the ground but flows across earth surface is called?
Runoff
What happens to hazardous materials when poured on the ground?
A hazardous material poured on the ground could soak into the ground, evaporate into the air, run off into ground water, or catch fire.
What would drier air cause a raindrop to do?
Evaporate before it reaches the ground, potentially.
