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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
What is the Earth's amount of gravity?
The acceleration of gravity on or near the Earth's surface is
9.8 meters (32.1 feet) per second per second.
Does gravity plays a role in the movement of glaciers?
Yes, gravity plays a crucial role in the movement of glaciers. Glaciers flow downhill under the influence of gravity, causing them to move slowly over time. The weight of the ice itself also contributes to the glacier's movement.
Are lanslide's and avalanches caused by gravity?
Yes, landslides and avalanches are both caused by the force of gravity. Gravity pulls the materials down a slope, causing them to move rapidly and potentially result in a landslide or avalanche. Other factors such as weather conditions, slope angle, and the presence of loose material can also influence the occurrence and severity of these events.
What is the affect of latitude n longitude of earth on gravity?
Your weight at the north or south pole would be ever so slightly greater than it is
at the equator, because the Earth is slightly fatter around the equator than it is
around the poles, so if you're standing on the equator, you're slightly farther from
the Earth's center of mass than you are if you're standing on one of the poles.
Other than that, your location on the surface of the Earth has no effect at all
on the forces of gravity that attract you and the Earth toward each other.
Which planet other than earth has gravity?
Every speck of mass in the Universe 'has gravity'. That includes every planet, comet,
asteroid, meteoroid, moon, artificial satellite, space ship, star, grain of dust, person,
car, dog, dish, shoe, goldfish, doorknob, rock, computer, soda can, cellphone, and the
lint in every pocket. Every one of them 'has gravity'.
Why does the Moon's gravity have a greater effect on earths oceans tides then the suns gravity?
-- The forces of gravity between two masses are inversely proportional to
the square of the distance between the masses, and directly proportional
to the product of the masses.
-- The sun is about 390 times as far from us as the moon is.
-- The square of 390 is 152,690.
-- So each little pellet of mass in the moon attracts each little pellet of water on
Earth 152,690 times as strongly as the same size pellet of solar mass does.
-- The sun has 27.08 million times as much mass as the moon has. So all the
pellets in the sun put together attract each little pellet of water on the Earth
27.08 million times as strongly as the whole moon would if it were at the same
distance from us as the sun is.
-- Put these two together, and you have 27.08 million times stronger, divided by
152,690 times weaker, = 177.4 times as much force in favor of the sun.
Surprise! The sun actually has a greater effect on the tides than the moon does.
Does gravity or wind quickly pulls rocks and dirt downhill in a landslide?
Gravity is the primary force that causes rocks and dirt to move downhill in a landslide. Wind can contribute to the movement of loose material, but gravity is the dominant force in causing landslides.
Hardness compares the weight of a mineral with the weight of an equal amount of water
Does Triton have a stronger gravity the Earth?
No. Surface gravity on Triton is only about 8% what it is on Earth.
How can light be trapped by the gravitational pull of a black hole if light has no mass?
When photons pass by a black hole, nothing happens, except gravitational lensing, wherein the photon is taking a shorter path due to the mass of the singularity more or less "stretching" space. Photons have no mass, so they are not affected by gravity at all. However, that is not necessarily true, I will follow up on this in a second. When a photon passes through the event horizon of a black hole, then it is caught within forever (Or at least until the singularity evaporates). A logical followup question would be if gravity doesn't affect photons, why can't they escape? Back to photon mass. Photons have momentum, so they must have mass but it's not regular mass. They have relativistic mass (Which is basically the same as Newtonian mass) which is dependent on the photon's wavelength and gravity doesn't care. Mass is mass. So now we've figured that photons do in fact have mass. Since a gravitational singularity in essence is nothing more than just an unimaginably dense object with extremely high mass, it effects gravity just like everything else but since it is so compressed into a tiny point. When you squeeze anything down past what is called the Schwarzchild radius (Which is proportional to the object's mass), you have a gravitational singularity and a black hole around it. If you were to compress an average human being down to about the size of 0.1 yoctometers (1x10^25 meters), that person would now be a black hole.
Back to the point: Once you pass that radius, the escape velocity is faster than the speed of light and it is impossible to go faster than light. If you have any real mass, you can't even travel at the speed of light because time essentially slows down so you cannot go faster. Therefore when photons pass through the event horizon, they are trapped because photons only travel at the speed of light, no faster but they can travel slower.
Yes. Without the gravity, we wouldn't be able to land on the ground after we jump.
To find the mass of the book in kilograms, you can use the formula: weight = mass x acceleration due to gravity. Given that the weight is 6.0 N and the acceleration due to gravity is 9.8 m/s^2, you can rearrange the formula to find the mass: mass = weight / acceleration due to gravity. Plugging in the values, you get mass = 6.0 N / 9.8 m/s^2 = 0.61 kg. Therefore, the mass of the book is 0.61 kg.
How strong is the gravity on each planet?
Gravity strengths at the equator for each of the planets is as follows, measured in g's, where 1 g is the standard earth gravity;
Mercury = 0.38 (or 38% that of earths)
Venus = 0.904
Earth = 0.99732
Mars = 0.376
Jupiter = 2.528
Saturn = 1.065
Uranus = 0.886
Neptune = 1.14
Does earth's molten core affect gravity?
First: The earths core is not molten, it is a very dense solid mass, kept solid by the intense pressure on it.
Second: It is the layer around this core that is molten, and yes it does influence gravity, but more so earths magnetism.
What Percent Of Earth's Density Does Jupiter Have?
Jupiter has about 24.8% of the average density of Earth. This is due to Jupiter being a gas giant composed mostly of hydrogen and helium, whereas Earth is a terrestrial planet made up of rock and metal.
What is the relationship between gravity and the movement of rock fragments?
Gravity plays a significant role in the movement of rock fragments. Rock fragments are often transported downhill by gravity through processes like landslides, rockfalls, and creep. The weight and slope of the terrain determine the speed and distance that rock fragments can travel due to gravity.
How does a density of sea water change with depth?
The density of seawater increases with depth due to the increased pressure at greater depths compressing the water molecules closer together. This increased density can also be influenced by temperature and salinity variations within different layers of the ocean.
Why do asteroids hit the moon?
Asteroids hit the moon because the moon lacks a protective atmosphere like Earth's that can burn up or break apart incoming objects. Over time, the moon's surface has been bombarded by asteroid impacts due to the lack of atmospheric protection.
What is elevation correction in gravity data correction?
if you know the acceleration due to gravity at earth surface (g) , and want to know new value higher up, you can use this:
a= g/((d/r)^2)
a = new acceleration value (m/s)/s
g = 9.81 (m/s)/s (surface acceleration)
d = new distance from earth center
r = distance to surface from earth center
: say you wanted to know the acceleration at geo stationary orbit (which is earth radius(6 371 000 meters) + 35 786 000 meters = 42 157 000 meters
from earths center, then
a= 9.81/((42 157 000/6 371 000)^2
a= 9.81/43.785
a=0.224 (m/s)s
Does gravity increase as you move under the earth?
Yes, but not for quite the reason you might think. If Earth were the same density throughout, gravity would decrease as you moved toward the center, as more and more of Earth's mass would be above you. However, Earth's density is not uniform. Earth's core is made mostly of iron, which is much denser than the rock that makes up the crust and mantle. So gravity would increase as you got closer to the dense. Once you cross into the core, gravity starts to decrease as described above until you reach the very center, where gravity (at least from Earth) is zero.
What is specific gravity of rocks?
Specific gravity of rocks is a measure of the density of a rock compared to the density of water. It is an important property in geology as it helps in identifying and classifying different types of rocks based on their specific gravity. The specific gravity of a rock can be used to infer its mineral composition and help determine its suitability for certain applications.
How do you get the specific gravity of a mineral?
Fill a beaker with water, and weigh it.
Weigh a sample of the mineral. That's the mass of the mineral.
Put the sample in the beaker and weigh that.
The weight of the water-filled beaker plus the weight of the mineral sample will be greater than the weight of the beaker with mineral sample and water. The difference is the weight of the displaced water, in grams.
The volume of the mineral sample, in cubic centimeters is equal to the weight of the displaced water, in grams.
Calculate the specific gravity of the mineral by dividing the weight of the mineral sample by the volume of the mineral sample.
Example: your beaker weighs 40 grams. Filled with water, it's 1040 grams. The sample of mineral weighs 160 grams. The beaker with the sample of mineral and water weighs 1179.7 grams.
The mineral, and the beaker with water would have a combined weight of 1200 grams, but the beaker with mineral and water weighs 20.3 grams less than that, so the mineral sample is displacing 20.3 cubic centimeters of water.
Given a mass of 160 grams and a volume of 2.03 CC, the specific gravity would be found by dividing 160 by 20.3. It's 7.85. (Which happens to be the specific gravity of some iron.)
Why value of 'g' decreases when you go inside the earth?
Because the value of "g" varies directly with the sum of the masses of the two bodies acted upon by the force of gravity. If you go inside the earth, only part of the mass of the earth will be attracting you toward its center; the mass of the part of the earth that is farther from the center than you are will be attracting you away from the center. If it were possible to reach the center of the earth, the value of "g" would reach zero because the mass of the earth would be acting upon equally you in all directions.
What is earths relative gravity?
Earth's gravity is approximately 9.81 m/s^2 at the surface, which is considered the standard for measuring the gravitational force on Earth. This value can vary slightly depending on location and altitude, but the overall range is within a few percentage points of the standard value.
What is affected by earth gravity?
Earth's gravity affects all objects with mass, pulling them towards the center of the planet. This includes everything from people and animals to buildings and vehicles. The force of gravity is what keeps us anchored to the ground and determines our weight.
