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energy

In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The SI unit of energy is the joule, which is the energy transferred to an object by the work of moving it a distance of 1 metre against a force of 1 newton. Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object's position in a force field (gravitational, electric or magnetic), the elastic energy stored by stretching solid objects, the chemical energy released when a fuel burns, the radiant energy carried by light, and the thermal energy due to an object's temperature. Mass and energy are closely related. Due to mass–energy equivalence, any object that has mass when stationary (called rest mass) also has an equivalent amount of energy whose form is called rest energy (in that frame of reference), and any additional energy (of any form) acquired by the object above that rest energy will increase the object's total mass just as it increases its total energy. For example, after heating an object, its increase in energy could be measured as a small increase in mass, with a sensitive enough scale. Living organisms require available energy to stay alive, such as the energy humans get from food. Human civilization requires energy to function, which it gets from energy resources such as fossil fuels, nuclear fuel, or renewable energy. The processes of Earth's climate and ecosystem are driven by the radiant energy Earth receives from the sun and the geothermal energy contained within the earth.
Windmill and tulips. - Windmill and tulips in the Netherlands.
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Windmill and tulips.

Added 3 days ago by Zeta

116 1

Windmills. - Dutch windmills.
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Windmills.

Added 5 days ago by Grażyna

20

Volcano.. - Volcano. Italy. Etna ..
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Volcano..

Added month ago by Grażyna

223 1

Dutch windmills. - Dutch windmills.
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Dutch windmills.

Added 2 months ago by Zeta

74 1

Book cover - Cover of a book
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Book cover

Added 2 months ago by Caravaggio

8

cute ghosts - beautiful, peaceful, miles of spirits
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cute ghosts

Added 2 months ago by MAJAMA

4

Sunset - colorful jigsaw puzzle
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Sunset

Added 4 months ago by andi

82

OLa dogs - this game is very nice
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OLa dogs

Added 4 months ago by ania

1

STORM-LOVE - A BEAUTIFUL VIEW OF A STRIKE
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STORM-LOVE

Added 4 months ago by NIKITA

86

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

82

tiny island - seaside landscape. island, beach, palm tree
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tiny island

Added year ago by sandra

111 1

minnisam - the little prince puzzle
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minnisam

Added year ago by mou

26

spring landscape - spring fields. agricultural landscape
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spring landscape

Added year ago by sandra

97

Lighthouse. - Cologne. Lighthouse.
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Lighthouse.

Added year ago by Zeta

52

storm over the sea - sea, ocean, lightnings, storm
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storm over the sea

Added year ago by sandra

178

Technique - colorful jigsaw puzzle
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Technique

Added year ago by andi

15

Dutch landscape - Holland, windmill, buildings
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Dutch landscape

Added year ago by sandra

56

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

119

Jigsaw puzzle - colorful jigsaw puzzle
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Jigsaw puzzle

Added year ago by andi

21

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

94

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

40

windmills - colorful jigsaw puzzle
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windmills

Added year ago by andi

381 1

route - game for route leaders
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route

Added year ago by Giu

265 1

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

283

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

69

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

285

Sunset - colorful jigsaw puzzle
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Sunset

Added year ago by andi

239

Landscape - colorful jigsaw puzzle
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Landscape

Added year ago by andi

301

logo - sqqwe q23er23e42 2er
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logo

Added year ago by w3qweq wqeqweqe

25

Internet - these puzzles are pushing the internet
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Internet

Added year ago by inetrnet

105

Sunset - colorful jigsaw puzzle
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Sunset

Added year ago by andi

95