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2. Preliminary reference Earth model - Wikipedia

   en.wikipedia.org/wiki/Preliminary_Reference...

   The preliminary reference Earth model (PREM) plots the average of Earth's properties by depth. [1] It includes a table of Earth properties, including elastic properties, attenuation, density, pressure, and gravity. PREM has been widely used as the basis for seismic tomography and related global geophysical models. [2]

3. Free-fall time - Wikipedia

   en.wikipedia.org/wiki/Free-fall_time

   The free-fall time is the characteristic time that would take a body to collapse under its own gravitational attraction, if no other forces existed to oppose the collapse.. As such, it plays a fundamental role in setting the timescale for a wide variety of astrophysical processes—from star formation to helioseismology to supernovae—in which gravity plays a dominant ro

4. Equations for a falling body - Wikipedia

   en.wikipedia.org/wiki/Equations_for_a_falling_body

   A set of equations describing the trajectories of objects subject to a constant gravitational force under normal Earth-bound conditions.Assuming constant acceleration g due to Earth's gravity, Newton's law of universal gravitation simplifies to F = mg, where F is the force exerted on a mass m by the Earth's gravitational field of strength g.

5. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

6. Projectile motion - Wikipedia

   en.wikipedia.org/wiki/Projectile_motion

   Projectile motion is a form of motion experienced by an object or particle (a projectile) that is projected in a gravitational field, such as from Earth's surface, and moves along a curved path (a trajectory) under the action of gravity only.

7. Template:Specific gravity - Wikipedia

   en.wikipedia.org/wiki/Template:Specific_gravity

   Download as PDF; Printable version; Material Specific gravity Balsa wood: 0.2 Oak wood: 0.75 Ethanol: 0.78 Olive oil: 0.91 Water: 1 Ironwood: 1.5 Graphite: 1.9–2.3 ...

8. List of equations in gravitation - Wikipedia

   en.wikipedia.org/wiki/List_of_equations_in...

   A common misconception occurs between centre of mass and centre of gravity.They are defined in similar ways but are not exactly the same quantity. Centre of mass is the mathematical description of placing all the mass in the region considered to one position, centre of gravity is a real physical quantity, the point of a body where the gravitational force acts.

9. Template:Did you know nominations/Reduced Gravity Walking ...

   en.wikipedia.org/wiki/Template:Did_you_know...

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