swansont

I don’t know in detail how Chinese submarines work, but I doubt the battery runs the main propulsion system. That requires a lot of power, and is likely run directly from a steam turbine. The battery might run a motor used in emergencies, when main propulsion is unavailable, capable of a few knots. If the primary propeller(s) became fouled, the emergency propulsion might be engaged, which likely has its own propeller. Different cultures place different emphasis on safety, and space is usually at a premium on a sub. And mistakes can be made. The US has safeguards and procedures put in place only after incidents revealed flaws, because sometimes they reveal flaws that don’t show up under normal ops, and are situations that you wouldn’t test for because it would be too dangerous to do so. e.g. There were significant changes made after the Thresher was lost in the 60s. https://www.usni.org/magazines/proceedings/2020/october/reflections-loss-thresher#:~:text=After the Thresher disaster%2C the,quick actuation in an emergency.

Batteries are a storage medium. The power comes from the reactor under normal operations. Batteries will supply a limited amount of power in case the reactor is scrammed. 2.6 MWh is not a lot of energy when considering a reactor that produces a full power of ~100 MW.

Who is “we”? Density is m/V if mass has units of kg, and volume is expressed in m^3, the units are kg/m^3. Or you could use grams/cm^3 No numbers. They aren’t necessary. This is a “you” problem. Stop blaming physicists.

The radiation we detect dates from the recombination epoch, ~380,000 years after the big bang.

If there was an absolute velocity we should see a diurnal effect in clock signals, since at noon we would be traveling at a different absolute speed than at midnight. The effect should also show an even larger fluctuation over the course of the year, from the change in orbital velocity. Do you have evidence of this?

k has units. you just don’t know what they are. That’s not the same thing. Like when you see 2x = 5, you don’t know what x is until you solve the equation. It doesn’t magically become 5/2 only when you solve it. There’s no time dependence here.

A gravitational field contains energy. Energy is a source of gravity.

The danger right now is people being too credulous and thinking that AI is actually intelligent and not some fancy predictive text algorithm.

The ISS is only about 400 km above the earth, which has a radius of about 6400 km.

What does this have to do with your assertion about evolution?

Center of mass in the hips, according to the study reported here https://www.dailymail.co.uk/sciencetech/article-6368865/T-Rex-turn-like-figure-skater-hell-far-agile-thought.html

A T. rex that was about 4 m tall, would be about 13 m long. The length of the tail factors into the torque, as well as the mass.

Inversion? Let’s say you have the equation 2x = 5 You can divide both sides by 2, and get x = 5/2 If you have F=-kx, you can divide both sides by x and get k = -F/x, or you can divide by k and get x = -F/k These are math rules that you seem to be having trouble with.

Which has already been shown to have been skewed toward the company and not the worker, during the last ~5 decades in the US

So the “big three” auto makers have settled, raising wages by 25% over the contract. “Ford, for example, said that the contract would make each vehicle the company produces around $900 more expensive.” https://www.thestreet.com/automotive/former-ford-ceo-has-a-blunt-warning-for-workers-following-the-conclusion-of-historic-auto-strikes But for an $18,000 car, that’s just a 5% bump over 4 years. Not really a big driver of inflation (Also, Toyota (non-unionized) is giving its workers raises, presumably to fight against unionization efforts and/or defections.)

F=-kx This is an equality What is on the left side is equal to what is on the right side. This applies (separately) to the magnitude, the direction, and the units If force is in Newtons (N) and x is in meters (m), the units for k will be N/m, because N/m * m gives you N. m, being in both the numerator and denominator, cancels, similar to what would happen if you were simplifying a fraction (e.g. 3/3 =1) This is not considered to be mysterious.

But when we do Sagnac experiments, the result is consistent with the earth rotation speed, not some absolute velocity, which doesn’t exist in relativity. We can look at interferometry results, and know that there is no effect from this alleged absolute velocity We can agree that the notion of an absolute frame was disproved. And the fact that we can and do synchronize clocks means there’s nothing wrong with the mainstream understanding.

You keep doing this - moving with respect to what? It’s a critical detail. Answer: with respect to the source. If the source and observer aren’t moving with respect to each other, it doesn’t take more time.

If we’re in an inertial system, since v=0 (the relative speed), the times will be the same.

Sagnac correction happens because the clocks are in an accelerated (rotating) coordinate system. SR applies to inertial systems.

What “experience” is this?

Kinetic energy depends on speed, not velocity. A force is applied but it does no work, hence the speed is constant.

But in your original equation. v is the relative velocity. That’s the problem. The source and detector are stationary with respect to each other, so there is no difference in the time. Whatever.

An immediate problem I see is that you are using v to refer to the relative speed of the detector with respect to the emitter, and also the speed of the rocket ship. Since these are different things, you should use different variables, so you don’t use the wrong one. For instance, in 2D/ ( c - v ) used in your clock synchronization, v=0 because the emitter and detector are at rest with respect to each other. The rocket speed doesn’t show up in the equation.

E=mc^2 is a statement about energy, nothing more. The time it takes to decay is dependent on the kind of decay and often on how much energy is released. Different isotopes have different daughters; there’s no reason to assume the energy released will be the same. Further, there are details of the shell structure has an effect - decays depend on the availability of states in the daughter isotope. There are no “parts” of a neutrino, and particles are released at the same time if conservation laws require it (e.g. an electron and antineutrino would be, owing to conservation of angular momentum and lepton number, but a photon would not generally be released at the same time)