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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 does the compass point north in the southern hemisphere?
The direction of magnetic flux or lines of force is from north polarity to south polarity, and a compass needle will always align with that direction, wherever it is used. Since the magnetic polarity of the location we call Magnetic North is a south, a compass needle will point in that direction.
The apparent force of gravity on earth is not the same all over, the spin of the earth means that you weigh less at the equator than at the poles, due to the centripetal force from the earths spin. You will weigh about 0.3% less at the equator. If the earth spun faster still, this difference would be even more apparent.
How do you find specific gravity of Iron ore?
Specific gravity is equal to the density of the iron ore divided by the density of water. The densities change with temperature, so I will assume a temperature of 4 degrees C for this calculation. At this temperature the density of water is 1000kg/m^3. There are various types of iron ore with varying densities. I found a reference table that states the density if iron ore ranges from 2100 to 2900kg/m^3. I will use the average: 2400kg/m^3. The reference table doesn't give a temperature, but oh well. I would choose 4 degrees C if I could. This gives us:
specific gravity=(2400kg/m^3)/(1000kg/m^3)
=2.4
Notice there are no units. This is a dimensionless parameter. It says iron is 2.4 times as dense as water. It will sink.
The largest tornado on record was the El Reno, Oklahoma tornado of May 31, 2013, which was at times 2.6 miles wide. As with any other tornado, it had absolutely nothing to do with the alignment of the stars or their gravity.
What is earths gravity weight?
An object doesn't have a single, definite weight. Its weight depends on where it
is and what other masses are nearby, so it can change. You probably know that
whatever your weight is on the Earth, it would be only 1/6 as much on the moon,
so you're familiar with the idea that 'weight' can change.
The Earth has one weight from being 238,000 miles from the moon, and a different
weight from being 93 million miles from the sun.
What makes the earth to have gavity?
The Earth has gravity because it has mass. Gravity is the force of attraction between two masses, and the more massive an object is, the stronger its gravitational pull. Earth's gravity is what keeps everything on its surface and governs the orbits of planets and other celestial bodies in our solar system.
Can there be gravity between mars and earth?
All celestial bodies exhibit some kind of gravitational pull on all other bodies. Hence, yes, it is very much possible to figure out the pull between the Earth and Mars. So yes, there can be, and is, gravity between our planets. Needless to say, the effect of Mars gravity on earth is overwhelmed by the effect of the suns gravity on earth. But it still exists.
The mutual forces of gravitational attraction between a glacier and the Earth
cause the glacier to slowly 'flow' downhill. Also, if any of the ice should melt
underneath the glacier, then the resulting liquid water flows similarly downhill,
although faster than the ice does.
Where is the earth center of gravity?
The center of gravity of Earth is at its core, which is near its geometric center. It is the point where the gravitational pull on an object can be considered to act.
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.
