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  2. Memory foam - Wikipedia

    en.wikipedia.org/wiki/Memory_foam

    A memory foam mattress is usually denser than other foam mattresses, making it both more supportive and heavier. Memory foam mattresses are often sold for higher prices than traditional mattresses. Memory foam used in mattresses is commonly manufactured in densities ranging from less than 24kg/m 3 (1.5 lb/ft 3) to 128kg/m 3 (8 lb/ft 3) density

  3. Quantum foam - Wikipedia

    en.wikipedia.org/wiki/Quantum_foam

    Quantum foam or spacetime foam is a theoretical quantum fluctuation of spacetime on very small scales due to quantum mechanics. The theory predicts that at these small scales, particles of matter and antimatter are constantly created and destroyed. These subatomic objects are called virtual particles. [ 1] The idea was devised by John Wheeler ...

  4. Matrix mechanics - Wikipedia

    en.wikipedia.org/wiki/Matrix_mechanics

    Matrix mechanics is a formulation of quantum mechanics created by Werner Heisenberg, Max Born, and Pascual Jordan in 1925. It was the first conceptually autonomous and logically consistent formulation of quantum mechanics. Its account of quantum jumps supplanted the Bohr model 's electron orbits.

  5. Sleep Experts Say These Memory Foam Pillows May Help ... - AOL

    www.aol.com/sleep-experts-memory-foam-pillows...

    The GlacioTex Cooling Memory Foam Pillow proved to be one of the best cooling pillows we tested for 2024, thanks to a combination of a phase-changing 50/50 polyester/polyethylene fabric cover and ...

  6. Quantum mechanics - Wikipedia

    en.wikipedia.org/wiki/Quantum_mechanics

    Quantum mechanics is a fundamental theory that describes the behavior of nature at and below the scale of atoms. [ 2]: 1.1 It is the foundation of all quantum physics, which includes quantum chemistry, quantum field theory, quantum technology, and quantum information science . Quantum mechanics can describe many systems that classical physics ...

  7. Foam - Wikipedia

    en.wikipedia.org/wiki/Foam

    Foam, in this case meaning "bubbly liquid", is also produced as an often-unwanted by-product in the manufacture of various substances. For example, foam is a serious problem in the chemical industry, especially for biochemical processes. Many biological substances, for example proteins, easily create foam on agitation or aeration.

  8. Quantum gravity - Wikipedia

    en.wikipedia.org/wiki/Quantum_gravity

    A depiction of the cGh cube. Quantum gravity (QG) is a field of theoretical physics that seeks to describe gravity according to the principles of quantum mechanics.It deals with environments in which neither gravitational nor quantum effects can be ignored, [1] such as in the vicinity of black holes or similar compact astrophysical objects, such as neutron stars, [2] as well as in the early ...

  9. Materials with memory - Wikipedia

    en.wikipedia.org/wiki/Materials_with_memory

    The study of these materials arises from the pioneering articles of Ludwig Boltzmann [1] [2] and Vito Volterra, [3] [4] in which they sought an extension of the concept of an elastic material. [5]