Energy & Green Tech
There is a largely untapped energy source along the world's coastlines: the difference in salinity between seawater and freshwater. A new nanodevice can harness this difference to generate power.
Sep 24, 2023
0
184
Robotics
Soft inflatable robots have emerged as a promising paradigm for applications that require inherent safety and adaptability. However, the integration of sensing and control systems in these robots has posed significant challenges ...
Sep 15, 2023
0
21
Engineering
The U.S. Air Force will invest $235 million to help a start-up manufacturer build a jet with a blended-wing body that officials say could provide greater range and efficiency for military tankers and cargo planes and perhaps ...
Aug 17, 2023
0
3
Engineering
For more than half a century, the 1,000-foot-diameter spherical reflector dish at the Arecibo Observatory in Puerto Rico was the largest radio telescope in the world. Completed in 1963, the dish was built in a natural sinkhole, ...
Aug 15, 2023
0
16
Software
The landmark Broadway musical "Hamilton" has landed on Roblox, turning the innovative stage show into an immersive online environment for a new generation.
Aug 9, 2023
0
1
Engineering
In June, the American Society of Heating and Air-Conditioning Engineers (ASHRAE) approved Standard 241, which establishes minimum requirements for building owners, operators and professionals to improve indoor air quality ...
Aug 2, 2023
0
39
Engineering
Static force, such as the weight of a person standing motionless on a bathroom scale or the force that an office full of equipment exerts on a high-rise floor, can be easily determined using scales, balances, load cells, ...
Jul 21, 2023
0
3
Robotics
This robot can swim under the sand and dig itself out too, thanks to two front limbs that mimic the oversized flippers of turtle hatchlings.
Jul 18, 2023
0
68
Internet
Google launched its AI chatbot Bard in the European Union and several more nations on Thursday, entering a key market in its race against Microsoft-backed ChatGPT after a delay over data privacy concerns.
Jul 13, 2023
0
1
Robotics
Addressing a fundamental challenge in robotics, Associate Professor Yoshihiro Nakata of The University of Electro-Communications, Japan, and Senior Researcher Tomoyuki Noda from the Brain Information Communication Research ...
Jun 30, 2023
0
24
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
