/u/shammalammadingdong's posts in /r/askscience

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What are the chances that there are an exact, natural number of Planck times in a single period of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom?

12 upvotes

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How would the BIPM proposed change in the SI units affect the numerical value of the gravitational constant?

7 upvotes

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On what day of the year is the Earth farthest ahead of the Sun relative to the Sun's orbit around the galactic center?

5 upvotes

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On what day(s) of the year is the ray from the Sun to the Earth pointing in the same direction as the Sun's (instantaneous) velocity around the galactic center?

3 upvotes

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If spacetime is fundamental, then why does the SI system contain units for duration (in time) and distance (in space) instead of a unit for interval of spacetime?

3 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
What are the chances that there are an exact, natural number of Planck times in a single period of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom?	12
How would the BIPM proposed change in the SI units affect the numerical value of the gravitational constant?	7
On what day of the year is the Earth farthest ahead of the Sun relative to the Sun's orbit around the galactic center?	5
On what day(s) of the year is the ray from the Sun to the Earth pointing in the same direction as the Sun's (instantaneous) velocity around the galactic center?	3
If spacetime is fundamental, then why does the SI system contain units for duration (in time) and distance (in space) instead of a unit for interval of spacetime?	3