russ_watters's latest activity
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russ_watters reacted to 256bits's post in the thread Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property? with
Like.
Here is a representations of 2 spheres, one 9% larger in volume than the other due to phase change of water from liquid to solid. -
russ_watters reacted to PeterDonis's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
If you want the path to be radial in an Earth-centered inertial frame, launching from the rotating Earth, you need to fire it backwards...
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russ_watters reacted to Dale's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
Yes. And at the point where they all meet the first two have the same velocity while the third does not. In the future please fill out...
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russ_watters reacted to PeterDonis's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
In an inertial frame centered on the Earth, in general, its trajectory will be an ellipse (assuming it never achieves escape velocity)...
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russ_watters reacted to PeterDonis's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
Meaning, with the same velocity as the satellite? Then, as has already been said, it will have the same orbit as the satellite. Which...
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russ_watters reacted to anuttarasammyak's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
Such a tower is considered as the space elevator
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russ_watters reacted to berkeman's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
Why does marble #2 fall?
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russ_watters reacted to nasu's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
The top of the tower moves with the same velocity as the satellite.
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russ_watters reacted to berkeman's post in the thread Simple kinematics problem — falling from a geostationary satellite with Like.
Welcome to PF. That's a trick question. If you release a marble from a geostationary satellite, it just continues in the same orbit as...
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russ_watters reacted to pbuk's post in the thread Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property? with Like.
No, they show a lot of deformation. It is impossible to say without measurement how the volume has changed.
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russ_watters reacted to pbuk's post in the thread Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property? with Like.
...which has deformed due to compression of the vapour as the ice expands.
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russ_watters reacted to pbuk's post in the thread Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property? with Like.
But your qualitative description ("I put some bottles of water in the freezer and it looks like they shrank") has already been addressed...
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russ_watters reacted to Andy Resnick's post in the thread Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property? with Like.
While the images of carbonated mineral water are highly informative, note that even 'still water' can have a lot of dissolved gas (air)...
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russ_watters reacted to Ibix's post in the thread Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property? with Like.
Indeed - it's a data point suggesting that water expands when it freezes. The density of ice in the bottle is lower than water, and...
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russ_watters reacted to Roberto Pavani's post in the thread Undergrad Is Water's Volume Expansion Upon Freezing an Intrinsic Property? with Like.
Corollary: since ice forms asymmetrically inside the bottle, it also expands asymmetrically. As noted by @Jonathan Scott, when a plastic...