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The history of fluid mechanics is a fundamental strand of the history of physics and engineering. The study of the movement of fluids (liquids and gases) and the forces that act upon them dates back to pre-history. The field has undergone a continuous evolution, driven by human dependence on water, meteorological conditions and internal ...
Prince Rupert's drop. Prince Rupert's drops (also known as Dutch tears or Batavian tears) [ 1][ 2] are toughened glass beads created by dripping molten glass into cold water, which causes it to solidify into a tadpole -shaped droplet with a long, thin tail. These droplets are characterized internally by very high residual stresses, which give ...
Historically, the witch's bottle contained the victim's (the person who believed they had a spell put on them, for example) urine, hair or nail clippings, or red thread from sprite traps. Later witch bottles were filled with rosemary, needles and pins, and red wine. Historically and currently, the bottle is then buried at the farthest corner of ...
Sodium silicate glass-to-glass bonding has the advantage that it is a low temperature bonding technique, as opposed to fusion bonding. [21] It is also less processing intensive than glass-to-glass anodic bonding, [23] which requires an intermediate layer such as SiN to act as a diffusion barrier for sodium ions. [23]
Mechanical pressing of glass reduced the time and labor necessary to make glass products, which lowered costs and made glass products available to more of the public. An 1884 U.S. government report considered mechanical pressing and a new formula for glass to be the two great advances in American glassmaking during the 19th century. [25]
Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible. Surface tension is what allows objects with a higher density than water such as razor blades and insects (e.g. water striders) to float on a water surface without becoming even partly submerged. At liquid–air interfaces, surface ...
The origin of water on Earth is the subject of a body of research in the fields of planetary science, astronomy, and astrobiology. Earth is unique among the rocky planets in the Solar System in having oceans of liquid water on its surface. [ 2] Liquid water, which is necessary for all known forms of life, continues to exist on the surface of ...
PATRICK WHITTLE and HOLLY RAMER. August 7, 2024 at 3:52 PM. The family of a French explorer who died in a submersible implosion has filed a more than $50 million lawsuit, saying the crew ...