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wing

A wing is a type of fin that produces lift, while moving through air or some other fluid. As such, wings have streamlined cross-sections that are subject to aerodynamic forces and act as an airfoils. A wing's aerodynamic efficiency is expressed as its lift-to-drag ratio. The lift a wing generates at a given speed and angle of attack can be one to two orders of magnitude greater than the total drag on the wing. A high lift-to-drag ratio requires a significantly smaller thrust to propel the wings through the air at sufficient lift. Lifting structures used in water, include various foils, including hydrofoils. Hydrodynamics is the governing science, rather than aerodynamics. Applications of underwater foils occur in hydroplanes, sailboats and submarines.
White heron. - White heron in the Danube delta.
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White heron.

Added 4 weeks ago by Zeta

31

Swans. - Two swans: white and black.
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Swans.

Added month ago by Grażyna

67

Safe Internet rules - 3. Internet is a treasure trove of knowledge, but remember that
not all the information that is in
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Safe Internet rules

Added 2 months ago by Nikola

2

Anime Girl - Photo Girl Wallpaper
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Anime Girl

Added 3 months ago by Duo Voice

1

beauty fox - Beauty fox has many beautiful designs (cmok)!
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beauty fox

Added 3 months ago by n.m

30 1

Anime Angel - Photo Angel Wallpaper
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Anime Angel

Added 3 months ago by Duo Voice

5

Anime Angel - Photo Angel Wallpaper
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Anime Angel

Added 3 months ago by Naya

0

Anime Angel - Photo Angel Wallpaper
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Anime Angel

Added 3 months ago by Naya

1

A late nightingale - for a Polish language lesson puzzle
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A late nightingale

Added 3 months ago by Monika

81

Chicken chicken - Chicken chicken farm
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Chicken chicken

Added 3 months ago by Chicken

41

lovely animals - white dove and rubella
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lovely animals

Added 3 months ago by Basiunia

46

life cycle - life cycle of Drosophila
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life cycle

Added 3 months ago by Juliet

12

colorful bird - colorful blue bird
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colorful bird

Added 3 months ago by Joasia

84 1

lapwing bird - lapwing is a wise bird is small and beautiful
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lapwing bird

Added 4 months ago by Sandra

20

White pigeon - White dove in the blue sky
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White pigeon

Added 4 months ago by Katqu

49

stork with a red beak - puzzle for preschool children
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stork with a red beak

Added 4 months ago by magda

73

Suigintou - Photo Angel Wallpaper
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Suigintou

Added 4 months ago by Naya

19

lovely animals - bird with a red tail
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lovely animals

Added year ago by Basiunia

38

dodo puzzle - dodo jigsaw puzzle dodo
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dodo puzzle

Added year ago by tre

59

xd is pepe - xdxdxdxdxdxdxdxdxdxdxdxdxdxdxdxdxdxdx
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xd is pepe

Added year ago by pepe

91

Colorful parrot - colorful parrot puzzle
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Colorful parrot

Added year ago by andi

41

Lucario - The character presents my favorite pokemon
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Lucario

Added year ago by KoKO

12

Siamese fighter - Lorem ipsum dolor sit amet
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Siamese fighter

Added year ago by Ayla

17

Blue parakeets - Blue parakeets
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Blue parakeets

Added year ago by Ayla

16

koliberek - Hummingbird is a beautiful flower
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koliberek

Added year ago by emi

52

White orchid - White orchid flower
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White orchid

Added year ago by elamela

96 1

Aircraft - colorful jigsaw puzzle
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Aircraft

Added year ago by andi

21

Swim or rise - Swim or rise up?
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Swim or rise

Added year ago by elamela

141

US fighters - colorful puzzle jigsaw
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US fighters

Added year ago by andi

47

pets and animals - beautiful animals and even more beautiful
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pets and animals

Added year ago by żaba

20

pets and animals - beautiful animals and even more beautiful
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pets and animals

Added year ago by żaba

34

pets and animals - beautiful animals and even more beautiful
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pets and animals

Added year ago by żaba

27

pets and animals - beautiful animals and even more beautiful
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pets and animals

Added year ago by żaba

36

pets and animals - beautiful animals and even more beautiful
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pets and animals

Added year ago by żaba

30

lovely animals - bird on a snowy branch
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lovely animals

Added year ago by Basiunia

37

flower like a bird - beautiful flowers resembling birds in flight
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flower like a bird

Added year ago by żaba

44

Landscape - colorful puzzle jigsaw
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Landscape

Added year ago by andi

91

Night nymph - Night nymph
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Night nymph

Added year ago by Anabell

56