New research suggests that our universe has no dark matter
The current theoretical model for the composition of the universe is that it's made of normal matter, dark energy and dark matter. A new University of Ottawa study challenges this.
The current theoretical model for the composition of the universe is that it's made of normal matter, dark energy and dark matter. A new University of Ottawa study challenges this.
Astronomy
Mar 15, 2024
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The period that liquid water was present on the surface of Mars may have been shorter than previously thought. Channel landforms called gullies, previously thought to be formed exclusively by liquid water, can also be formed ...
Planetary Sciences
Mar 14, 2024
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The value of publicly traded Astra Space has been falling since it shelved a rocket design that only went for 2 for 7 on launches, including two highly visible failures from the Space Coast. Now the company is going private.
Space Exploration
Mar 11, 2024
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Expanding our scientific understanding often comes down to getting as close a look as possible at what is happening. Now researchers from Japan have observed the nanoscale behavior of azo-polymer films while triggering them ...
Nanomaterials
Mar 11, 2024
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If SpaceX's Starship and Super Heavy ever finds a home on the Space Coast, what would be the most powerful orbital rocket to ever launch from here is going to have an environmental impact.
Environment
Mar 7, 2024
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A more efficient way to capture fresh water from the air could be inspired by a phenomenon of motion first glimpsed in bowls of breakfast cereal.
General Physics
Mar 7, 2024
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Once a housewife in rural India, Sharmila Yadav always wanted to be a pilot and is now living her dream remotely, flying a heavy-duty drone across the skies to cultivate the country's picturesque farmlands.
Agriculture
Mar 6, 2024
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Just over a week ago, European physicists announced they had measured the strength of gravity on the smallest scale ever.
General Physics
Mar 4, 2024
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In a study recently published in the journal Small, researchers from Nano Life Science Institute (WPI NanoLSI), Kanazawa University, Japan, collaborating with Professor Sarikaya, Seattle, U.S., used frequency modulated atomic ...
Bio & Medicine
Mar 4, 2024
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70
Atomic force microscopy, or AFM, is a widely used technique that can quantitatively map material surfaces in three dimensions, but its accuracy is limited by the size of the microscope's probe. A new AI technique overcomes ...
Nanomaterials
Feb 28, 2024
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In physics, a force is any influence that causes an object to undergo a change in speed, a change in direction, or a change in shape. In other words, a force is that which can cause an object with mass to change its velocity (which includes to begin moving from a state of rest), i.e., to accelerate, or which can cause a flexible object to deform. Force can also be described by intuitive concepts such as a push or pull. A force has both magnitude and direction, making it a vector quantity. Newton's second law, F=ma, was originally formulated in slightly different, but equivalent terms: the original version states that the net force acting upon an object is equal to the rate at which its momentum changes.
Related concepts to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque which produces changes in rotational speed of an object. Forces which do not act uniformly on all parts of a body will also cause mechanical stresses, a technical term for influences which cause deformation of matter. While mechanical stress can remain embedded in a solid object, gradually deforming it, mechanical stress in a fluid determines changes in its pressure and volume.
This text uses material from Wikipedia, licensed under CC BY-SA