Gravity

The sun's rotation does not cause gravity. Gravity is a fundamental force of attraction between objects with mass, and it is always present regardless of whether an object is rotating or stationary. Rotation affects other aspects of a celestial body's behavior, such as its shape and magnetic field, but not the force of gravity itself.

Yes, space itself does not have gravity as it is a vacuum. However, massive objects like stars and planets create gravity due to their mass. This gravity causes objects to be attracted towards them in space.

I'm not sure what you mean by "a stable orbit". The Earth's center of mass ...

nominally the Earth's center ... always lies in the plane of any Earth orbit, so

the ground track of the orbit must either cross the equator or coincide with it.

Yes, they are called Lagrange points. Between any two objects in space there are 2 points in between them at which the pull of gravity from both cancel each other out.

Mass is an intrinsic property of an object that remains the same regardless of the object's location or the gravitational force acting upon it. Weight, on the other hand, depends on the gravitational force and is determined by the mass of an object and the acceleration due to gravity. So, a person's mass does not change, but their weight can vary depending on the gravitational force.

Mercury does get affected by the sun's gravity, which keeps it in orbit around the sun. However, the speed at which Mercury orbits the sun, along with its distance from the sun, allows it to maintain a stable orbit rather than being pulled in completely.

Zero gravity can cause muscle atrophy, decrease in bone density, fluid shift to the upper body, and changes in cardiovascular function due to the lack of gravity pulling blood towards the legs. Astronauts in space experience these effects and must exercise regularly to counteract them.

Acceleration due to gravity on Saturn = 11.171 m/s2

(9.807 m/s2 on Earth)

Google Gravity is a fun project from the developers at Mr. Doob that allows users to experience Google's search functionality in a different way. When you search for something in Google Gravity, results will appear as if they are being affected by gravity, causing them to fall and bounce around the screen. It's a playful and interactive way to explore the capabilities of web design and programming.

Yes, there is gravity on the International Space Station (ISS), but it is not due to the station being in Earth's orbit. The sensation of weightlessness experienced by astronauts aboard the ISS is because they are in a state of constant free fall towards Earth, creating the effect of microgravity.

Earth is affected by the moon's gravity. The moon's gravity exerts just as much force on Earth as Earth's gravity does on the moon, but since Earth is far more massive, it undergoes far less acceleration.

Everything with mass or energy experiences gravity, from planets and stars to objects as small as a single atom. Gravity is a fundamental force in the universe that causes objects to be attracted to each other.

While there is no gravity in space, gravity from Earth still affects objects in close proximity. Meteors fall towards Earth due to its gravitational pull. As the meteor enters Earth's atmosphere, it experiences friction which heats it up and causes it to glow, creating a meteor trail.

value of acceleration due to gravity is maximum at the surface of earth. So the gravitational field strength.

as g'=g(1-d/R)

at surface d=R

so d=R

so g'=g

at earth's centre g=0. Its value decrease with decrease or increase in height.

as:

g'=g(1-2h/R) ......for height h

and

g'=g(1-d/R) .....for depth d

Stems grow against gravity due to a process called phototropism, where they bend towards light. This phenomenon allows plants to optimize photosynthesis by positioning their leaves to receive more sunlight. Additionally, stems typically grow upwards against gravity to reach for resources such as light and nutrients.

For a single body, the center of gravity (center of mass) must be within the object. It is the single point at which all of an object's mass can be considered to act.

For multiple bodies in a system, the center of mass can fall within a body or anywhere between bodies. The joint center of mass is called the "barycenter."

The force of mutual gravitational attraction between the earth and any other object

pulls the object toward the center of the earth, and pulls the earth toward the center

of the object. Both pulls have equal strength.

The force of gravity between two bodies decreases when the distance between them is increased. This relationship follows an inverse square law, meaning that the force of gravity is inversely proportional to the square of the distance between the bodies. Therefore, if the distance is increased by a factor of 4, the force of gravity will decrease by a factor of 16.

Modulating gravity waves is currently beyond our technological capabilities, as gravity waves are extremely weak and difficult to manipulate. These waves are produced by massive cosmic events such as colliding black holes or neutron stars, and detecting them requires highly advanced equipment like LIGO (Laser Interferometer Gravitational-Wave Observatory).

Kepler's laws of planetary motion, which he formulated in the early 17th century, described the motion of planets around the sun but did not involve a formal understanding of gravity. Newton's law of universal gravitation, developed in the late 17th century, provided a theoretical explanation for Kepler's laws based on the force of gravity between masses. So Kepler did not believe in the same laws of gravity as Newton, but Newton's work built upon Kepler's observations.

Gravity is a fundamental force that governs the motion of objects in the universe. It causes celestial bodies like planets, stars, and galaxies to attract and interact with each other, creating orbits and shaping the structure of the universe. Gravity also plays a key role in the formation of structures like galaxies and galaxy clusters.

Because fifty years of secret human and animal experimentation, in laboratories,

under water, and in space, have led to the inescapable conclusion, with which

there are no longer any dissenters, that human astronauts are more productive,

more alert, more efficient, and generally happier, and last significantly longer into

the mission, when they're able to breathe, and the resources to do so are provided.

Yes, gravity pulls all objects towards Earth's center, regardless of their density. However, denser substances have more mass per unit volume, so they may sink lower in the Earth's crust due to density variations.

The larger the object, the more 'space' is displaced, and thus, the greater the gravity. The Moon displaces less 'space' than the Earth, so the Moon has less gravity. The space station displaces very little space AND its' shape does not lend itself to taking advantage of the spacial displacement, so it doesn't result in very much gravity.

Stand in a swimming pool and hold a beach ball under the water: the pressure of the water on the ball is a simulation of gravity. Hold a tennis ball under the water: far less pressure, yes? Now, hold something with the exact same collective mass as the beach ball (lets say one of those 'noodle' things the kids play with) and you'll have far less pressure on it than on the beach ball. Why? It has the same mass as the beach ball, so why isn't there the same amount of pressure (gravity) on it? Because the 'shape' of it does not lend itself to take advantage of the gravitational pressure.

Gravity can, however, be simulated with inertia. If the ship spins... centripical force and all that.

Yes, scientific evidence, such as redshift measurements of distant galaxies, indicates that the universe is still expanding. This expansion is believed to be accelerating due to dark energy, a mysterious force that counteracts gravity at large distances.