Tesla semi

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   / Tesla semi #611  
You know the laws of physics aren't actual laws right?

Here's Coulomb's law: Coulomb's law - Wikipedia

However, if you dig a little deeper it turns out that the "law" is only accurate for static or nearly static objects. As soon as they start moving Einstein's theory of relativity kicks in and things change slightly:
Coulomb's law - Wikipedia

Like I mentioned earlier, our "laws of physics" only represent what we understand about the world at this exact point in time. Even if we know the laws for hundreds of years novel applications can combine them in interesting ways to produce incredible things. Take the transistor for instance, we understood the theory behind it for a long time but only recently has modern material science turned it into something that now drives just about every part of our modern life.

That's the stuff I'm talking about here.

The "laws" of physics are descriptive (describe regularities observed in our universe), not prescriptive (like traffic laws that have penalties attached for violations).

On a deeper level the basic laws of classical physics are the conservation laws of energy, of linear momentum, of angular momentum, and of electric charge. These laws arise from symmetries of the void (every symmetry has an associated conservation law) discovered in 1915 by mathematician Emmy Noether (Noether's theorem). In addition, quantum theory has a few other conservation laws that arise from symmetries of the Hilbert space on which quantum theory is based. These symmetries and the associated conservation laws are what drive progress in modern physics.
 
   / Tesla semi #612  
The "laws" of physics are descriptive (describe regularities observed in our universe), not prescriptive (like traffic laws that have penalties attached for violations). On a deeper level the basic laws of classical physics are the conservation laws of energy, of linear momentum, of angular momentum, and of electric charge. These laws arise from symmetries of the void (every symmetry has an associated conservation law) discovered in 1915 by mathematician Emmy Noether (Noether's theorem). In addition, quantum theory has a few other conservation laws that arise from symmetries of the Hilbert space on which quantum theory is based. These symmetries and the associated conservation laws are what drive progress in modern physics.
Yeah, can 140lbs of battery power a car for 400 miles with heater on and recharge in under 5 minutes. You get that you got a chance.
 
   / Tesla semi #613  
The port of Long Beach is one of the major gateways for imports into the U.S. There are hundreds of diesel trucks there at any one time, engines idling (and polluting), waiting to get a container loaded onto its trailer from one of those gigantic container ships. From there the load takes a 50-60 mile trip to the hundreds of warehouses in the Inland Empire (San Bernardino, Riverside, Ontario, etc) for distribution. Here is an ideal situation for something like the Tesla Semi. The Long Beach port authority has to limit the amount of truck idling because of air pollution from the diesels. Electric semis will make a big difference.

Update on Port of Long Beach environmental policy (from LA Times):

LA, Long Beach ports plan for zero emissions

BY TONY BARBOZA Los Angeles Times
LOS ANGELES
The nation痴 largest port complex approved a sweeping plan Thursday to slash air pollution by encouraging the phase-out of diesel trucks in favor of natural gas and, ultimately, zero-emission trucks and cargo-handling equipment over the next two decades.

The Clean Air Action Plan, unanimously adopted at a joint meeting of Los Angeles and Long Beach harbor commissioners, provides a framework for transforming the massive hub for freight-moving trucks, trains and ships to cleaner technologies through 2035. But it leaves many details undetermined, including who will pay for up to $14 billion in cleaner trucks and equipment and which industries will benefit.
The plan is the most significant and expensive environmental initiative yet by the ports, which have sought to distinguish themselves from competitors over the last decade by pioneering air quality improvements, some of which have been replicated by other seaports and enshrined by California regulators.
Despite dramatic reductions in diesel emissions under the port痴 2006 clean-air plan, the Angeles-Long Beach port complex remains the largest single source of air pollution in Southern California, with progress tapering off in recent years.
State and local air quality regulators say attacking the ports overwhelmingly diesel-fueled operations is crucial to cleaning the nation痴 worst smog to meet federal health standards, reducing greenhouse gas emissions and easing asthma, lung cancer and other pollution-triggered health problems from harbor-area communities to the Inland Empire region.
Also to be seen are the economic impacts of transforming the ports, which handle about 40 percent of U.S. imports, and support hundreds of thousands of jobs across Southern California. Though the volume of shipping containers moving through the complex has tripled since the mid-1990s, the ports face increasing competition from East and Gulf Coast ports, which have less stringent environmental mandates.
By adopting the plan, the ports are expecting businesses and taxpayers to foot the bill for improvements in air quality and public health. They are also sending a signal to manufacturers there will be demand for cleaner trucks and freight-moving equipment, and ultimately, models with no tailpipe emissions.
Another question is how quickly the ports strategies will reduce emissions and whether they will satisfy the demands of state and local regulators, who are increasingly targeting port pollution for reductions they say are crucial to reduce health risks and clean smog in time to meet federal deadlines.
While the plan outlines goals to switch to zero-emission cargo-handling equipment by 2030 and trucks by 2035 and slash greenhouse gas emissions 80 percent by 2050, it lacks new targets for reducing smog-forming emissions.
Key to the plan is a new Clean Trucks Program that aims to phase out oldest, dirtiest diesel trucks, transition to cleaner natural gas models, and ultimately switch to electric and other zero-emissions models.
Starting mid-2018, new big rigs entering the ports registry must have engines of model year 2014 or newer, which must meet more stringent emissions standards.
In 2020, trucks will have to meet a stricter, near-zero-emissions standard, or be charged a fee to enter port terminals.
Starting in 2023, trucks must meet or exceed the near-zero emissions standard to enter the registry.
By 2035, only zero-emission vehicles will be exempt from those charges.
Before casting their votes, harbor commissioners heard from environmentalists, community groups and local elected officials, some holding their asthma inhalers, who expressed disappointment with the plan. They said it does not go far enough.
 
   / Tesla semi #614  
Long beach has a lot to learn from others.
 

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   / Tesla semi #615  
Let me know when you get that lithium battery up to 50% of the speed of light .

Okay then answer me this.

Cellphone data speeds have exploded over the last 10 years(10KB/sec from GPRS up to 40MB/sec for currently deployed 4G LTE). Just to get that in absolute terms that's 10,000 to 40,000,000 bytes per second. In that time the allocated frequency ranges haven't increased that much, most of the 4G allocations are only 40Mhz wide and support more users at more speeds than before.

My question to you is this:

If real-world data speeds have increases 4000x in the last 10 years but frequency allocation has stayed the same are they breaking the laws of physics?

I'll take either yes or no. If you decide to change the subject I'll take that as an assumption that the state of the world is not fixed in stone and it's possible to make advancements with our current understanding of physics.

Here's a hint, if frequency allocation was 1:1 with data speed you'd start hearing cellular data over FM radio in order to support hundreds of users per cell at 40 MB/sec.
 
   / Tesla semi #616  
Probably we'll still have local delivery by human, at least in my lifetime (unless drones get a lot larger). Still, one would think that anyone whose job can be automated would be seeing what else they can do, perhaps something less amenable to automation.

I can just see it, 'mid air drone collisions over Manhattan' making headlines on CNN!
 
   / Tesla semi #617  
Isn't that what we presently have? Tax rebates for EV are available for everyone. Tax rebates for Hostess Twinkies aren't available for anyone.

Yes, agree but the guy on minimal salary with mortgage and 3 overextended credit cards will never qualify for the loan to buy a new electric car.
Shucks he buys 2-3 clunkers a year as they die off one after the other.
He has no choice as he can't afford the repair bills but sharks will finance a new clunker.
 
   / Tesla semi #618  
Okay then answer me this.

Cellphone data speeds have exploded over the last 10 years(10KB/sec from GPRS up to 40MB/sec for currently deployed 4G LTE). Just to get that in absolute terms that's 10,000 to 40,000,000 bytes per second. In that time the allocated frequency ranges haven't increased that much, most of the 4G allocations are only 40Mhz wide and support more users at more speeds than before.

My question to you is this:

If real-world data speeds have increases 4000x in the last 10 years but frequency allocation has stayed the same are they breaking the laws of physics?

I'll take either yes or no. If you decide to change the subject I'll take that as an assumption that the state of the world is not fixed in stone and it's possible to make advancements with our current understanding of physics.

Here's a hint, if frequency allocation was 1:1 with data speed you'd start hearing cellular data over FM radio in order to support hundreds of users per cell at 40 MB/sec.


No laws of physics were broken. Just the hardware and software were developed to carry the near theoretical of data for that frequency. Thinking that cellular data rates will increase 10 again in 10 years is similar to expecting a 10 fold increase in battery storage density .
There are hard limits that can not be designed around . For example aircraft cruise speed is most practical at subsonic speeds , there is a practical limit.
Trying to jam more electrons into the same sized battery is like trying to pour two gallons of liquid into a one gallon vessel. Same as trying to extract more than 118,000 btu of energy from a gallon of gasoline, ain’t gonna happen no matter how much we want to happen or how much research we perform.
As for other sources of sub atomic energy, strong and weak nuclear forces....works awsome on Star Trek, then again Star Trek ain’t real. Ever notice how large and expensive the Large Hadreon Collider is just to make a few atoms dance .
All tech has a practical limit, the improvements do come to a practical limit.
 
   / Tesla semi #619  
Yeah, can 140lbs of battery power a car for 400 miles with heater on and recharge in under 5 minutes. You get that you got a chance.

My 1995 Ford F250 held over 200 lbs. of fuel, took just over 5 minutes to fill up, and had a range of about 350 miles per fill. I guess it never had a chance either ...
 
   / Tesla semi #620  
All tech has a practical limit, the improvements do come to a practical limit.

You seem to be stuck on this same argument. No one argues that present battery technology will lead us to the holy grail. Improvement will require new battery technologies.
 
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