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Gravity

One of the four fundamental interactions, gravity is responsible for the fact that any objects with mass attract one another. According to general relativity, it is a space time curvature, but according to quantum mechanics it is the result of exchanges of virtual gravitons.

4,784 Questions

Why a stone drowns in a sea whereas a ship do not?

A stone sinks in water due to its density being higher than that of water. On the other hand, a ship is designed to displace enough water to create buoyancy, keeping it afloat. The ship's shape, size, and material all contribute to its ability to float on water.

What was gravity destroyer's special move on beyblade?

Gravity Destroyer's special move was called "Black Excalibur." It was a powerful attack where the beyblade would spin rapidly while releasing a dark energy wave to strike the opponent's beyblade.

What is the relationship between base of support and line of gravity?

The base of support is the area beneath an object or person that sustains their weight. The line of gravity is an imaginary line passing through the center of gravity of an object or person. The relationship between the two is that a wider base of support provides more stability because it allows for better alignment with the line of gravity, reducing the risk of tipping or falling over.

What factors affect the acceleration due to gravity on a planet and how?

By far the most significant factor is the mass of the planet, thus, primarily effects which alter mass would be those which affect the gravitational field. There are some relativistic effects which can affect mass or gravity such as speeds approaching that of light, and also spin which can alter the radial component of the gravitational field, through the frame dragging effect (usually explained through general relativity's description of gravitation as a curvature of spacetime).

Friction and gravity always a hindrance?

Friction and gravity are physical forces that can act as hindrances in various situations. Friction resists the relative motion of surfaces in contact, while gravity pulls objects downward. These forces can make it more difficult to move objects, slow them down, or keep them grounded.

What happen when the downward pull of gravity on an object is equal to the upward force of water?

When the downward pull of gravity on an object is equal to the upward force of water (buoyancy), the object will float at a certain level in the water. This is known as the object being in equilibrium, where the forces are balanced and there is no net force acting on the object.

How do the planets stay in orbit and not crash into the sun due to its gravitational pull?

When dealing with the distances and times you are referencing they will eventually go back together. The time is in billions of years.
The whole idea of expansion and shrinkage of the universe is in play here.

Is walking is the work against gravity?

Walking across the room is not work against gravity.

Walking up the stairs is work against gravity.

Walking down the stairs is work with gravity.

Why all objects travel at the same velocity?

All objects do not necessarily travel at the same velocity. The velocity of an object depends on factors such as its mass, the force acting on it, and any external influences like friction. In a vacuum, objects of different masses would fall at the same rate due to gravity acting uniformly on all objects.

What is the specific gravity of caustic soda liquor 20 percent?

The specific gravity of caustic soda liquor at 20% concentration is approximately 1.125.

What happens if center of gravity is outside the body?

If the center of gravity is outside the body, it can lead to instability and difficulty maintaining balance. This can increase the risk of falling or toppling over. To prevent this, it's important to ensure proper posture and alignment to keep the center of gravity within the body's base of support.

Does gravity have an effect on objects of different sizes?

Yes, gravity affects objects of different sizes in the same way. It depends on the mass of the objects and the distance between them. All objects are attracted to each other by gravity, following the universal law of gravitation.

How does gravity conform to the bending of the space time fabric?

I'll use one of the favourite analogies, I think this is from a popular science book by Kaku(I'm not sure, maybe someone can help tell if I'm right about the author). Imagine a 2 dimensional worm crawling on a piece of paper. If we crumple a paper and then put the worm on it, it will move sideways as if it is experiencing a force, this is because it can't see the third dimension(height), hence it can't percieve the crumpled paper. All it sees is that it changes direction as if a force is acting on it, whereas in reality it's the folds on the paper that is the culprit! Similarly, gravity is bending of the spacetime fabric that's 4 dimensional, which we percieve as a force in 3 dimensions.

When is gravity not so helpful?

Gravity is not so helpful in situations where we require objects or people to remain weightless, such as during space travel or when performing certain experiments in physics. Additionally, gravity can be a hindrance in activities like rocket launches or when trying to achieve a stable orbit around a celestial body.

What is the specific gravity of sodium hydroxide?

What is the pH of sodium hydroxide?

What I determined from a wide range pH paper is that the pH of a .1 M solution of sodium hydroxide was that between 11 and 12.

How does increasing mas affect gravity?

Gravity has no effect on mass, and mass has no effect on gravity. The characteristic

behavior of gravity is that the force between two masses is directly proportional to

the product of the masses, so if one or both masses were to increase, the mutual

gravitational forces between them would increase in proportion to the increase in

the product. That happens regardless of what the starting or ending mass happens

to be, because mass has no effect on gravity.

What would happen to a rock in the garden if no forces were ever applied to it?

If no forces are applied to the rock, it would remain in a state of rest, potentially being subject to other natural forces like wind or erosion. Over time, it may undergo changes due to weathering and geological processes, but it would generally stay in place as long as no external forces act upon it.

Does gravity force a hellium balloon to rise?

No, not directly ... it needs gravity to be present, but gravity alone won't do it.

There's plenty of gravity on the moon, but a helium balloon won't rise there.

A helium balloon floats in air, for exactly the same reason that a block of wood

floats in water. Look up "Archimedes' Principle" and read about it.

What two factors do gravity depend on?

The forces that arise on account of gravity depend on the masses of

the objects being attracted toward each other, and on the distance

between their centers.

Why does a block of wood held underwater rise to the surface when released?

Because the weight of the wood is less than the weight of an equal volume of water.

So when it's completely submerged, the upward buoyant force on it is greater than

the downward gravitational force on it. The wood accelerates in the direction of the

net force on it, exactly as one wood expect.

Mass or weight.Which is dependent upon gravity?

Weight is dependent upon gravity, while mass is a measure of the amount of matter in an object and remains constant regardless of the gravitational force acting on it. Weight is the force of gravity acting on an object's mass, causing it to have a different value depending on the strength of the gravitational field.

How does an object affect its accelration during free fall?

Without propellers, jets, or a parachute, an object can't to anything to affect its

acceleration when it's falling.

"Free fall" means moving under the influence of gravity only, with not even any air

resistance. In that situation, on or near the surface of the Earth, acceleration is

constant, regardless of the size, shape, mass, weight, or gender of the falling object.

That number is 9.8 meters (32.2 feet) per second2 ... known as the acceleration of gravity

on Earth.

What is the name of mabels pig in gravity falls?

Mabel's pig in Gravity Falls is named Waddles. He is Mabel's beloved pet pig and often accompanies her on her adventures.

What happens to the acceleration of an object as it falls through air?

-- If you really mean "falls through the air", then its acceleration steadily decreases.

-- If you're actually thinking about an object that's "falling", with no air in the way and

no other influence on it except gravity, then its acceleration is constant as it falls.

Does gravity pull objects apart?

In order for that to happen, one object must be positive mass and the other one

must be negative mass. Negative mass has never been observed yet, so gravity

has never been observed to push objects apart.