Recent comments in /f/askscience

risk-vs-reward t1_j9zf2fn wrote

Reply to Can you experience g-force without acceleration? by tenminutes101010

On the ride soarin at Disney you are essentially seated on a big swing. As you are “flying” they tilt you back and you get the feeling of acceleration without any motion other than slight rotation backwards (5 degrees?). I think shifting your weight from the seat to the seat back makes you feel like you are experiencing g force.

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JonJackjon t1_j9zbbfe wrote

Reply to What determines the size of an Eddy Current? by Gopher_Lad

Currents induced in a conductive material are a function of the magnetic field being imposed on the material and its electrical resistance.

Putting holes in a subject material increases the electrical resistance. Hence the resulting field will be weaker.

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Natural-Cap4008 OP t1_j9zb9nr wrote

Reply to comment by CrustalTrudger in How much do the different factors affect sea level rise? by Natural-Cap4008

Thank you! Basically perfectly answered my question/s. So steric changes make up only 40%. Looking at the NASA website you linked, it's a bit hard to tell if increase in each type is linear or exponential. You mentioned that the current rate is accelerating, can you expand on this a little, and whether the acceleration is the same 60-40 percentages of steric vs volume, or if say the acceleration is more due to volume changes so you might expect that ratio to increase over time? (I think I'm articulating what I'm thinking)

Again thank you for your response!

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OpenPlex t1_j9zao8u wrote

Reply to comment by CrustalTrudger in When a volcano erupts, does this affect the pressure building up in other volcanoes? by Rhamni

> At a simple level, any given volcano represents an isolated system, i.e., surface vents connected to a magma chamber within the crust, e.g., this diagram, while for a specific volcanic system is a decent generic representation to consider.

Why does the magma in that image travel up as lone tendrils? What's the physics of that?

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PureImbalance t1_j9zahjg wrote

Reply to how accurate is the greenland ice core oxygen isotope study in regards to earth's climate history ? by Additional-Rhubarb-8

For the entire Earth's climate history, it is not one core from one place that will tell us everything. It's why climate catastrophe denialists keep bringing up the "medieval warming period" which anybody in the field knows was a local anomaly, not a global one (or you'd see it reflected in records of other places). So standalone, the Greenland ice core is quite accurate for the local climate of Greenland. In context with the various measures of our past climate, it contributes another degree of certainty to the consensus global climate, more accurately reflecting the overall global climate.

Slight tangent but this phenomenon of local vs global is quite important when we think about other questions too, e.g. does the COVID vaccine cause heart disease (insert one statistic from one country that seems to correlate the two) - here you can ask if this is reflected in all the other countries as well, or might more related to something local (which could be as benign as how data was collected in one place)

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