The point is that none of the molecules in the system ever climb up
in the gravitational field in equilibrium.
an ideal gas
in a gravitational field in thermal equilibrium because, as is well known, thermal equilibrium is an isothermal state..»
Those same textbooks carefully demonstrate that there is no lapse rate in an ideal gas
in a gravitational field in thermal equilibrium because, as is well known, thermal equilibrium is an isothermal state; nothing as simple as gravity can function like a «Maxwell's Demon» to cause the spontaneous stable equilibrium separation of gas molecules into hotter and colder reservoirs.
Not exact matches
«To place a man
in a multi-stage rocket and project him into the controlling
gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth - all that constitutes a wild dream worthy of Jules Verne.
For those who need the introductions, Melroy is a retired Air Force officer and former NASA astronaut who piloted the space shuttle Discover, Drell is one of the foremost leaders
in the
field of particle physics, and Malvala is an astrophysicist and member of the team that first detected
gravitational waves from colliding black holes.
For instance, if the earth were slightly larger, hydrogen, a light gas, could not escape into the atmosphere at its prescribed rate (due to an increase
in the earth's
gravitational field), and over time would build up and cause life to cease.
This rapid decline of the political imagination and discourse of the American left
in the wake of Kennedy's assassination led,
in time, to another surprise: a reversal
in the
gravitational field of American political ideas.
The culture concept is one of the great illuminating ideas of modern science, comparable
in importance to the concept of evolution
in biology, the concept of electromagnetic and
gravitational fields in physics, and the concept of the atom
in chemistry.
Could their relations be reversed such that the order of coming to be was from greater to less entropy, from more evolved and developed to less evolved and developed, or from downward falling to upward falling objects
in a
gravitational field?
At the one extreme lies the superconduction of the
field at absolute zero temperature; at the other, the lack of radiation
in a
field of «black hole» entities with infinite density (so that they no longer exert even
gravitational influence mutually).
It is not especially illuminating to know that a human being falling
in a uniform
gravitational field moves according to the law s = 1/2 gt2 — though such information might be of vital importance to divers, high - wire walkers, parachutists, and others engaged
in activities of the utmost gravity.
In this work, Gupta perforzns the quantization of Einstein's
gravitational field.
There is nothing very romantic about the desperation some of us feel when we try to operate
in this crazy world outside of the
gravitational field of Easter.
I believe that the acceleration due to gravity is proportional to one over the distance squared
in weak
gravitational fields, because it has been measured literally millions of time and not violated.
In general relativity it is impossible to tell a
gravitational field from a
field set up by one's own motion.
The resulting theory, though founded on quite different principles and developed
in an independent fashion from Einstein's theory, nevertheless gives predictions that are identical to the latter's, within observable limits, for each of the four classic tests of
gravitational theories (i.e., precession of the perihelion of Mercury, redshift of light emitted by a massive body, the bending of light - beams
in a strong
gravitational field, and the apparent slowing of the speed of light propagation near massive bodies).
«Orbits and rays
in the
gravitational field of a finite sphere according to the theory of A. N. Whitehead.»
Briefly, Whitehead initially (
in works published circa 1919 - 1924) objected to Einstein's formulation of the theory of relativity on the grounds that for Einstein the geometry of the world was variable, its metric being a function of
gravitational and electromagnetic
field variables.
According to the Einsteinian formulation of GTR, the physical magnitudes so represented define the metric structure of the space - time continuum, and
fields of
gravitational force are interpreted as inextricably intertwined with this structure.29 According to the Whiteheadian formulation of 0TH, the physical magnitudes so represented define a physical characteristic, the «impetus,» against the background of a uniform metric structure.30
In effect, Einstein incorporates
fields of
gravitational force into a theory about the metric structure of the space - time continuum, whereas Whitehead retains such
fields as special physical factors constitutive of the physical
field associated with an event.
- The Earth «hangs» on the
gravitational fields of the sun, moon, and other planets
in its vicinity.
You think the miracles of creation (existence)
in Genesis are less credible than a quantum flux out of a weak
gravitational field resulted
in organic matter simply by adding a time function.
By studying
gravitational waves, they can now explore extreme conditions
in which the energy
in an object's
gravitational field accounts for most or all of its mass — the realm of strong gravity so far explored by theorists alone.
The signals generated by the magnitude - 9.1 quake that struck Japan were barely one - billionth g, the amount of Earth's
gravitational field at sea level, but they traveled at the speed of light and were detected at seismometers hundreds of kilometers away, the researchers report today
in Science.
Lens - like action of a star by the deviation of light
in the
gravitational field.
Now, researchers have come up with a way to more quickly gauge a big quake's magnitude and thus provide faster, more accurate tsunami warnings: by measuring the miniscule changes
in Earth's
gravitational field that are generated when massive slabs of the planet's crust shift by dozens of meters over the course of a few minutes.
Just as light waves can be polarized horizontally or vertically depending on which way the electromagnetic
field in them jiggles,
gravitational waves can be polarized
in two ways, according to general relativity, Will says.
A
gravitational field tells us the strength of gravity at different points
in space.
She has since gone on to establish herself
in the
field of weak
gravitational lensing, which involves studying the subtle distortions
in images of distant galaxies to probe the nature of mysterious dark matter and dark energy.
One goal is to test whether entanglement is affected by a changing
gravitational field, by comparing a photon that stays
in the weaker
gravitational environment of orbit with an entangled partner sent to Earth, says Anton Zeilinger, a physicist at the Austrian Academy of Sciences
in Vienna.
«An atom interferometer uses the quantum «wave - like» nature of atoms
in order to make very precise measurements of accelerations, rotations, and
gravitational fields»
ANCIENT pieces of continental crust that are falling to the bottom of the Earth's mantle could explain mysterious dents
in our planet's
gravitational field.
The imbalanced and dynamically shifting
gravitational field created by Pluto and Charon sends the smaller moons tumbling
in unpredictable ways.
In 1960 a Harvard laboratory measured the warping of time in a gravitational field, and some 20 years later researchers found indirect evidence for the existence of gravity wave
In 1960 a Harvard laboratory measured the warping of time
in a gravitational field, and some 20 years later researchers found indirect evidence for the existence of gravity wave
in a
gravitational field, and some 20 years later researchers found indirect evidence for the existence of gravity waves.
The scientists relied on data from the pair of GRACE satellites — NASA's Gravity Recovery and Climate Experiment orbiters launched
in 2002 — that measure subtle changes
in Earth's
gravitational field, which are often the result of shifting water, whether on the surface or deep beneath it.
Researchers create a bizarre effect once thought to only occur
in intense
gravitational fields
We all, [you] know, [have an] intuitive [feel for it]-- you know, the apple falling
in Newton's garden pulled by a
gravitational field.
Steve Capps wondered if gravity could affect atomic clocks: «Since time slows
in a
gravitational field, are atomic clocks so sensitive that perhaps moving them from the ground floor to the second or third floor of a building would have a measurable effect, given that gravity would be less on the higher floors?»
He also adds: «The tidal effect on an asteroid, which rapidly rotates under the
gravitational field of a planet, can fragment these objects or release large rocks from its surface, which could then become such dangerous projectiles at a local scale as the one fell
in Cheliábinsk (Russia) on February 15th 2013.»
In the presence of a gravitational field, the particles would generate a secondary field, which, in the case of galaxies, could explain the mass discrepanc
In the presence of a
gravitational field, the particles would generate a secondary
field, which,
in the case of galaxies, could explain the mass discrepanc
in the case of galaxies, could explain the mass discrepancy.
That's a lot of new jobs — a 35 % increase over 10 years — but for job seekers, landing top jobs may require additional skills
in geodesy, a branch of applied mathematics that measures the Earth's
gravitational field, and cartography, as well as a familiarity with
fields such as human geography and social media.
Instead the team used data from a satellite called the Gravity Recovery and Climate Experiment (GRACE), which measures changes
in Earth's
gravitational field that are caused by changes
in mass.
So when a dim star
in our galaxy passes almost directly between Earth and a second star, the
gravitational field of the intervening «lens» star bends and magnifies light from the background star, a process called
gravitational microlensing.
During spaceflights, and
in future habitats on the Moon or Mars, humans are or will be exposed to a condition of «microgravity,»
in other words to a
gravitational field much smaller compared to that present on Earth.
And a gravimeter picks up tiny changes
in Earth's
gravitational field, perfectly mapping the seafloor's rocky bottom.
Geoscientist David Gallaher works
in the DC - 8's former baggage compartment, now fitted with instruments that collect data such as glacial thickness and changes
in Earth's
gravitational field.
The
gravitational fields of the largest stars can constrain materials
in their cores estimated to be as hot as 200 million °C and that is probably the highest stable temperature currently
in the universe.
These two thoughts — free fall feels the same as being at rest
in gravity - free space, and accelerating upward through space feels the same as sitting at rest
in a
gravitational field — form what is known as the equivalence principle.
(We have a vicarious sense of this «zero - g» situation today from footage of space station astronauts, who are not outside of Earth's
gravitational field, but actually
in free fall as they orbit Earth.)
Between 1892, when Poincaré published his treatise on the problem, and the mid-1960s, a series of mathematicians followed Poincaré's suggestion of painstakingly looking for weirdly shaped periodic orbits — the mathematical loops
in the fabric of a three - body
gravitational field.
According to Einstein's theory, your position
in a
gravitational field changes the rate at which you experience time passing.