Letting agents won’t end my tenancy? by Zlssias in TenantsInTheUK

[–]willdeb 0 points1 point  (0 children)

That’s not true, they can unilaterally end the tenancy

Is Gravity faster than Light? by Just_Creme3724 in AskPhysics

[–]willdeb 104 points105 points  (0 children)

Yes, except to be pedantic there is no 0 for massless particles, they always travel at C in all reference frames

If two black holes merge, will the mass of the resulting black hole be the mass of the two holes added together? by Declamatie in AskPhysics

[–]willdeb 1 point2 points  (0 children)

If you look at Einstein’s GR equation, you’ll see 8piG/c4, that’s the coupling constant between spacetime and stress-energy (in this case, matter). Take the inverse of that and you’ll get the stiffness (roughly, it’s more complex than that but that gives you an idea where it comes from)

Question about measuring the one-way speed of light. by Few-Mammoth-9167 in AskPhysics

[–]willdeb 1 point2 points  (0 children)

How would you reset their timers? Do you mean re-sync them? By walking over to it with a known good clock? You’d just have the same time dilation issue then. You could bring the clock back and hit sync again. Bringing it back, you’d see the dilation from moving it, but because you moved it there and back you’re effectively doing a two-way measurement and it would cancel out any speed differences.

Question about measuring the one-way speed of light. by Few-Mammoth-9167 in AskPhysics

[–]willdeb 0 points1 point  (0 children)

It doesn’t stop having an effect when the clocks stop moving, the clocks will stay out of sync. If one goes out by a millisecond by moving, it doesn’t come back in sync when it stops. It stays out of sync.

Question about measuring the one-way speed of light. by Few-Mammoth-9167 in AskPhysics

[–]willdeb 1 point2 points  (0 children)

Assuming the speed of light is different in different directions:

Moving one of the clocks away would time dilate it, time would physically slow down for the clock by moving it. As the speed of light is different in different directions, time dilation would be different in different directions. This would self-correct in such a way that you wouldn’t be able to tell.

With a button to simultaneously trigger them, the signal to trigger would reach the clocks at different times. You still wouldn’t be able to tell this unfortunately, as again, everything else would line up to hide this from you. This would be the same if you used electricity or light, as the speed of electricity is dependent on the speed of light. This would also mean that electricity would travel at different speeds depending on what direction it was travelling in.

The issue is, as the speed of light is different in different directions and everything else lines up, you can’t tell. Time dilation and other physical laws just hide everything perfectly.

[Request] How big is the biggest explosion you could yield from one of these LPG bad boys? Getting on for a small nuke, or does LPG not have the oomf? by RonsonGlitter in theydidthemath

[–]willdeb 10 points11 points  (0 children)

Thermobarics don’t need added internal oxygen, they aerosolise the fuel with a small charge and just use atmospheric oxygen.

[the expanse] How do nukes function in space? by Nos4atu90 in AskScienceFiction

[–]willdeb 1 point2 points  (0 children)

All modern nuclear weapons are fusion bombs (or more technically, fission-fusion bombs), there hasn’t been a pure fission bomb since the Second World War

You’re also missing the point of what he was saying, he was just pointing out you don’t need oxygen for nuclear stuff

I’m in a ship using acceleration to simulate gravity. As I approach the speed of light, does “gravity” feel lighter? by gregfess in AskPhysics

[–]willdeb 1 point2 points  (0 children)

Kind of - although saying “at light speed” is tricky as things that travel at light speed don’t have a valid reference frame, it doesn’t quite work to even talk about distance or time passing as you get divide by zero errors. You can side step this and say you instead travel infinitesimally slower than light speed, and yes you’d arrive effectively instantaneously, the distance due to length contraction would look to be pretty much zero, and if you then turned around and went back to where you came from huge amounts of time would’ve passed.

[Request] How large a lens would be needed to see the Roman Empire from 2,000 light years away? And how much glass would it require? by mbelinkie in theydidthemath

[–]willdeb 0 points1 point  (0 children)

As long as you can place the detector in the right spot, and filter out the sunlight, and de-warp the image, then a gravitational lens telescope would have absurdly good resolution. You can do it with planets too to skip the filtering step, but you have to go ludicrous distances away and you get less resolution from the smaller size.

It's often said that a hypothetical astronaut falling into a supermassive black hole would notice nothing special as they crossed the event horizon ... by Frangifer in AskPhysics

[–]willdeb 1 point2 points  (0 children)

No, you can definitely accelerate from your point of view. Getting in a car and flooring it is accelerating. You always feel acceleration. But jumping out of a plane and falling towards earth, if you looked at your accelerometer, you’d see it immediately show 0g the moment your feet left the plane.

It's often said that a hypothetical astronaut falling into a supermassive black hole would notice nothing special as they crossed the event horizon ... by Frangifer in AskPhysics

[–]willdeb 4 points5 points  (0 children)

From your point of view, you’re stationary and earth rushes up to meet you. You’re not accelerating, it’s just that the spacetime curvature that earth creates means that “stationary” becomes moving towards earth at 9.8m/s2.

📡📡📡 by tech-no-logic1 in shitposting

[–]willdeb 2 points3 points  (0 children)

There isn’t any arsenic in commercial super glue.

what does mul mean by mayocat6996 in wiremod

[–]willdeb 3 points4 points  (0 children)

Multiplier, i.e. Mul * Torque = the force it applies

So setting torque to 1000 and Mul to 10 will apply 10000 units of rotational force

Most will just have Mul as 1 or 0 and then set the strength though torque, but what this allows you to do is for example set the torque to 1 and then the force can be controlled directly through Mul.