I use newly digitised data on a million book translations for 1949鈥0 to study the factors that affect the international diffusion of ideas carried by books. I estimate a gravity model and find translation flows decrease significantly with distance, although distance matters less in later years ...
Newton publicized his Theory of Universal Gravitation in the 1680s. It basically set forth the idea that gravity is a predictable force that acts on all matter in the universe, and is a function of both mass and distance. The theory states that each particle of matter attracts every other ...
How does the strong nuclear force affect an atom? What is the range of nuclear force? How much stronger is the strong nuclear force than gravity? How quickly does strong nuclear force decrease? How does the strong nuclear force stabilize the nucleus? How does the strong nuclear force affect ...
From a distance, the sun and all its planets may look like perfect spheres. They're not. Centrifugal force and "self-gravity" combine to keep them in the shape of an oblate spheroid. Such objects may resemble true spheres, but they're somewhat squashed. Take Earth. The radius of our pl...
t in a line under the force of a given acceleration, the distance y an object will fall under the force of gravity in time t is yielded by the expression d = (1/2)gt2, or 4.9t2for objects falling under the influence of Earth's gravity...
As with soarplane gliders, the balance of these three forces (lift, drag, gravity) determines how high the hang glider can go, how far it can travel and how long it can stay aloft. The performance of a hang glider and the distance it can travel is determined by its glide ratio (lift...
How does the value of gravitational force F change between two objects? Newton's Law of Gravitation: Between any two objects with mass, there is always an attractive force acting between them. This attractive force is called the gravitational force. The gravitational force between two o...
It turns out that measuring the distance to a star is an interesting problem! Astronomers have come up with two different techniques to estimate how far away any given star is. The first technique uses triangulation (a.k.a. parallax). The Earth's orbit around the sun has a diameter of ...
Gravity recovery and climate experiment NOAA: National oceanic and atmospheric administration IMF: Interplanetary magnetic field Dst: Disturbance storm time AE: Auroral electrojet EUV: Extreme ultraviolet Sfu: Solar flux units TEC: Total electron content NASA: National aeronautics and space ad...
Urbanization and climate change are contributing to severe flooding globally, damaging infrastructure, disrupting economies, and undermining human well-being. Approaches to make cities more resilient to floods are emerging, notably with the design of flood-resilient structures, but relatively little is kno...