Recent content by Dmstifik8ion
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Stargazing Apparent vs actual position of stars
I realize my thinking must be skewed somehow given the way distant galaxies appear in one locality despite the varying distance of its individual light sources. I would just like to wrap my mind around why this is so given that more distant objects are not where they appear from the vantage...- Dmstifik8ion
- Post #10
- Forum: Astronomy and Astrophysics
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Stargazing Apparent vs actual position of stars
http://thetechnews.com/wp-content/uploads/2016/06/milky-way-wallpaper-24.jpg That better?- Dmstifik8ion
- Post #4
- Forum: Astronomy and Astrophysics
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Stargazing Apparent vs actual position of stars
Perhaps it would help if I adjusted the focus knob a little better :wink:- Dmstifik8ion
- Post #3
- Forum: Astronomy and Astrophysics
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Stargazing Apparent vs actual position of stars
When we ‘see’ the Sun, from here on Earth, what we are actually seeing is the Sun as it was over 8 minutes ago when the light we currently observe first embarked on its journey towards us. In that time the Sun has in fact arrived at a position about two degrees east of the place it now appears...- Dmstifik8ion
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- Position Stars
- Replies: 16
- Forum: Astronomy and Astrophysics
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Graduate Tidal lock due to rotation of displaced mass
As I understand it, the rate of rotation of a body is slowed as a consequence of the grater gravitational attraction on the mass displaced by tidal forces as this displacement is pulled forward by the effected bodies rotation thus acting to provide a counter rotational force until tidal lock is...- Dmstifik8ion
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- Lock Mass Rotation Tidal
- Replies: 1
- Forum: Astronomy and Astrophysics
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Undergrad How does the design of piano strings and the use of hitch pins affect tuning?
Piano wire is made of steel and is very stiff. The thickness of a piano wire is also much greater than a guitar string and is more characteristic of a rod than a string. The bend in the wire at the point where it goes around the hitch pin in addition to friction negates slippage for the...- Dmstifik8ion
- Post #25
- Forum: Other Physics Topics
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Graduate Illustrating the CMB: Drawing Concentric Circles to Show Expansion Over Time
On a sheet of paper draw four concentric circles, one outside the other. Fill the innermost circle with dots. This is the CMB photons at the point in time when they were scattered throughout the early universe and first became liberated from the spreading dense matter cloud that scattered...- Dmstifik8ion
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- Cmb
- Replies: 6
- Forum: Cosmology
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Rust vs Magnetic Tape: Comparing Properties
Rust is paramagnetic (attracted to but not maintaining magnetism). How is this different from the iron oxide used in magnetic recording media?- Dmstifik8ion
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- Magnetic Rust
- Replies: 2
- Forum: Chemistry
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Graduate Would an Object Fall Straight Through a Hole in a Spinning Planet?
Thanx Janus, LURCH, and DaveC426913, Obviously a subterranean "orbit" wound not be geosynchronous, what was I thinking? . . . don't answer that! I'm off with my shovel now; wish me luck!- Dmstifik8ion
- Post #6
- Forum: Astronomy and Astrophysics
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Graduate Would an Object Fall Straight Through a Hole in a Spinning Planet?
My thought was that the object when released would have the component "horizontal" momentum of the surface from which it was released. This horizontal component of its initial vector would cause the object in free-fall to "orbit" the center of gravity of the planet. (Rotational velocities...- Dmstifik8ion
- Post #3
- Forum: Astronomy and Astrophysics
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Graduate Would an Object Fall Straight Through a Hole in a Spinning Planet?
Ignoring the intense heat and pressure of subterranean environments, the difficulties of constructing a hole under such conditions, drag and friction, etc: Only a hole through the axis of rotation will provide a straight trajectory or one the passes through the exact center of a spinning...- Dmstifik8ion
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- Hole Planet Spinning
- Replies: 5
- Forum: Astronomy and Astrophysics
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Graduate Mutual effects of gravity and velocity on time
Thanks, the links are perfect!- Dmstifik8ion
- Post #4
- Forum: Special and General Relativity
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Need help with question regarding circular motion.
You can give someone a sin but you cannot make them read.- Dmstifik8ion
- Post #5
- Forum: Introductory Physics Homework Help
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Graduate Mutual effects of gravity and velocity on time
The Earth takes the shape of an oblate spheroid due to its rotation and so gravity is stronger at the North/South Poles while the Equator has a velocity relative to the Poles. When we consider General Relativity (the effect of gravity on the passage of time) together with Special Relativity...- Dmstifik8ion
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- Effects Gravity Time Velocity
- Replies: 3
- Forum: Special and General Relativity
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News Your greatest sacrifice for the world
There is no sacrifice that can be truly beneficial. All action between two or more people is either mutually beneficial or not beneficial at all. One can no more sacrifice themselves for the benefit of others than one can benefit from sacrificing themselves to themselves. Value can not be...- Dmstifik8ion
- Post #5
- Forum: General Discussion