Last Updated on September 11, 2022 by amin
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What is Earth bulge?
n. The gradual increase of the radius of a planet or star from the poles to the equator resulting in a deviation from a perfect spherical shape caused by the object’s rotation.
Why do we have 2 tides a day?
Because the Earth rotates through two tidal “bulges” every lunar day coastal areas experience two high and two low tides every 24 hours and 50 minutes. … This occurs because the moon revolves around the Earth in the same direction that the Earth is rotating on its axis.
What causes a bulge to be created on the opposite side of the Earth or the far side from the moon?
On the “near” side of the Earth (the side facing the moon) the gravitational force of the moon pulls the ocean’s waters toward it creating one bulge. On the far side of the Earth inertia dominates creating a second bulge. In this way the combination of gravity and inertia create two bulges of water.
Why is the Earth squashed?
The Earth’s rotation creates an outward force that is highest at the equator and zero at the poles. Since the Earth is not perfectly solid throughout this force results in the Earth being ‘squashed’ into a slightly flattened sphere. See also how to say caesar
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The Earth bulges out at equator. Why?
Are there pictures of the whole Earth?
Nasa has released the first picture of the Earth that it has taken in 43 years. The picture which has come from a camera on board the Deep Space Climate Observatory (DSCOVR) is the first picture of the whole Earth that has been seen since 1972. See also what does oases mean
Do we have a full picture of the Earth?
No human since has been far enough from Earth to photograph a whole-Earth image such as The Blue Marble but whole-Earth images have been taken by many uncrewed spacecraft missions.
Is the Earth flattening?
Since the Earth is flattened at the poles and bulges at the Equator geodesy represents the figure of the Earth as an oblate spheroid.
Can we survive without the moon?
The moon influences life as we know it on Earth. It influences our oceans weather and the hours in our days. Without the moon tides would fall nights would be darker seasons would change and the length of our days would alter.
Equatorial Bulge
Why does the moon not spin?
The illusion of the moon not rotating from our perspective is caused by tidal locking or a synchronous rotation in which a locked body takes just as long to orbit around its partner as it does to revolve once on its axis due to its partner’s gravity. (The moons of other planets experience the same effect.)
How far is Earth from space?
Experts have suggested the actual boundary between Earth and space lies anywhere from a mere 18.5 miles (30km) above the surface to more than a million miles (1.6 million km) away.
Is the earth an ellipsoid?
The earth’s shape is not a sphere but an ellipsoid. Just as a sphere is based on a circle an ellipsoid is based on an ellipse. … To be more precise the earth rotates about its shortest axis or minor axis and is therefore described as an oblate ellipsoid. The earth is not a perfect sphere but an oblate ellipsoid.
What causes precession quizlet?
The slow movement of the axis of a spinning body around another axis due to a torque acting the direction of the first axis. Precession is caused by the gravitational forces of the sun and the moon in a terrestrial orbit.
Can a planet only have one moon?
“All planets except Mercury and Venus have at least one moon. … While the Jovian planets have a total observed number of moons of close to 90 the Terrestrial planets have only 3 (the Moon and two small moons around Mars). This huge difference is linked to the formation of the solar system.” See also why are cells considered the smallest unit of life
Why is it high tide on both sides of the Earth?
Answer: You are right in that high tide occurs on the sides of the Earth which face toward and away from the Moon. This is due to the fact that around the Moon is pulling on the Earth and the ocean on the sides facing the Moon. The Earth compensates for this pulling by bulging out both toward and away from the Moon.
How big is the moon?
1 737.4 km
What is the mechanism that produces the Earth’s magnetic field?
The magnetic field is generated by electric currents due to the motion of convection currents of a mixture of molten iron and nickel in the Earth’s outer core: these convection currents are caused by heat escaping from the core a natural process called a geodynamo.
Why is Earth’s equatorial diameter greater than its polar diameter?
Why is Earth’s equatorial diameter greater than its polar diameter? The centrifugal force that is generated from Earth’s rotation causes Earth to bulge in the equatorial region. … It splits the globe into two equal halves and therefore depicts the shortest distance between two points.
In which direction does the Earth rotate *?
Earth’s rotation or Earth’s spin is the rotation of planet Earth around its own axis as well as changes in the orientation of the rotation axis in space. Earth rotates eastward in prograde motion. As viewed from the north pole star Polaris Earth turns counterclockwise.
Why do spinning objects flatten?
The equilibrium shape of a rotating star–or planet for that matter–is not a sphere but rather an flattened oblate spheroid. … The reason is that centrifugal effects are greatest at the rotational equator and work against the object’s self-gravity.
What causes Earth’s equatorial bulge quizlet?
What is the equatorial circumference of the earth? … an apparent outward force caused by the spinning (or rotating) of earth on its axis. This force causes the earth to bulge at the equator.
Why does Jupiter bulge at the equator?
Points near the equator must move faster because they have more area to cover during a rotation. … Its rapid rotational speed of nine hours and 50 minutes per revolution gives Jupiter a prominent bulge around the equator.
Does the ocean bulge at the equator?
These differences affect gravity being greater at the poles and lesser at the equator. With atmosphere happens the same thing. Therefore both atmosphere and oceans have an equatorial bulge because of less gravity at very low latitudes.
What is the equatorial bulge of Earth?
The Earth has an equatorial bulge of 42.72 km (26.5 miles) due to its rotation. That is its diameter measured across the equatorial plane (12756.28 km 7 927 miles) is 42.72 km more than that measured between the poles (12713.56 km 7 900 miles).
What causes the Earth’s bulge?
The Earth is slightly oblate in that it has an equatorial bulge due to the centrifugal force caused by the Earth’s rotation. … The differential force of gravity is called the tidal force. The tidal force in this case causes a torque in the physics terminology.
How wide is the moon?
3 474.8 km
What would happen to the Earth is the Sun lost its pull?
Gravity is the force that pulls Earth and stops it from going off in some other direction.” Without the sun’s gravitational pull Earth would move in a straight line away from the sun. … If Earth left the sun’s orbit the moon would continue to revolve around Earth because of gravity.
Why does Earth bulge at the equator?
What is the true shape of the earth?
Centuries have passed and now we know that Earth isn’t flat but rather an oblate spheroid. Basically it is almost flat at the poles and circular at the sides. It is slightly elliptical but mostly like a sphere. That is how it becomes an oblate spheroid.
Which planets bulge at the equator?
Saturn which has a rotation period of just over 10 hours and a mean density less than that of water has the greatest equatorial bulge of all the planets with an equatorial diameter nearly 11% greater than its polar diameter.
Is the Earth taller or wider?
The Earth is a bit wider than it is tall giving it a slight bulge at the equator this shape is known as an ellipsoid or more properly a geoid. The Earth’s diameter at the equator is 7 926.28 miles and its diameter at the poles is 7 899.80 miles.
Why Does Earth Bulge At The Equator?
The Earth is wider at the equator than from pole to pole mainly because the centrifugal forces of its rotation make it bulge outwards. Satellites can measure its average shape using gravity and altitude data. Over most of the past 20 years these observations showed that overall the Earth is becoming more round.Aug 2 2002
Is Earth bulge at the equator?
On Earth. The Earth has a rather slight equatorial bulge: it is about 43 km (27 mi) wider at the equator than pole-to-pole a difference which is close to 1/300 of the diameter. … The rotation of the earth also affects the sea level the imaginary surface that is used to measure altitudes from.
What is eccentricity of the earth?
Earth’s orbital eccentricity e quantifies the deviation of Earth’s orbital path from the shape of a circle. … The present eccentricity of Earth is e ≈ 0.01671. In the past it has varied between 0 and ∼0.06.
Is the earth an egg?
The inside of the earth is layered something like an egg. Both have a thin brittle shell. The crust of the earth is broken into pieces like the cracked shell of a hardboiled egg. The mantle of the earth is like the egg white and the core of the earth lies in the center like the egg yolk.
What shape is Earth NASA?
Even though our planet is a sphere it is not a perfect sphere. Because of the force caused when Earth rotates the North and South Poles are slightly flat. Earth’s rotation wobbly motion and other forces are making the planet change shape very slowly but it is still round.