Welcome to DU! The truly grassroots left-of-center political community where regular people, not algorithms, drive the discussions and set the standards. Join the community: Create a free account Support DU (and get rid of ads!): Become a Star Member Latest Breaking News Editorials & Other Articles General Discussion The DU Lounge All Forums Issue Forums Culture Forums Alliance Forums Region Forums Support Forums Help & Search

Science

longship

(40,416 posts)

12. Absolute rubbish.

Reply to DetlefK (Reply #11)

Fri Jun 17, 2016, 07:21 AM

Jun 2016

Momentum is conserved.
No matter how one twists things.

Conjugated variables????? That's nothing I learned in my physics degree. Sounds like rubbish to me.

As does the EM drive. There is no such thing as a reactionless space drive. Or a warp drive, for that matter.

Pushing on ones steering wheel does not propel ones car forward. Newton got that correct.

Edit history

Please sign in to view edit histories.

Recommendations

0 members have recommended this reply (displayed in chronological order):

28 replies

= new reply since forum marked as read

Highlight:

New paper claims that the EM Drive doesn't defy Newton's 3rd law after all [View all] n2doc Jun 2016 OP

Been keeping up with that thing, It is intriguing. I wonder how strong gravity would affect it tonyt53 Jun 2016 #1

Magnets? itsrobert Jun 2016 #2

I know you are being snarky TexasProgresive Jun 2016 #3

Why doesn't my car move forward when I push on the steering wheel? longship Jun 2016 #4

Yeah, except that it does Warpy Jun 2016 #5

That would violate all sorts of physics. longship Jun 2016 #6

Did you read the article? Warpy Jun 2016 #7

I am aware of the EM drive. longship Jun 2016 #8

Of course it is. Now read the article Warpy Jun 2016 #9

I read it. It's still bollocks. longship Jun 2016 #10

No, people aren't interested because it "has no emissions" muriel_volestrangler Jun 2016 #15

The rocket equation is pretty simple. longship Jun 2016 #16

No, it's not just Newton's Laws. Propellant mass is key to it muriel_volestrangler Jun 2016 #17

So in other words it doesnt violate any laws because the particles its emitting (?) or cstanleytech Jun 2016 #18

Light has momentum, but no mass muriel_volestrangler Jun 2016 #20

I thought that in the end everything had mass even light but if it doesnt have mass then how can it cstanleytech Jun 2016 #21

Light is affected by gravity, but it doesn't have mass of its own muriel_volestrangler Jun 2016 #22

My heads hurting now, I think I need an iburprofen :P lol cstanleytech Jun 2016 #23

We'll, it's conservation of momentum. longship Jun 2016 #24

But photons don't have a mass, but do have momentum muriel_volestrangler Jun 2016 #26

Because your car is invariant to spatial coordinate-translations. DetlefK Jun 2016 #11

Absolute rubbish. longship Jun 2016 #12

I'm sorry to say, but then your physics degree is a sham. You should demand your money back. DetlefK Jun 2016 #13

Heisenberg may have been here. longship Jun 2016 #14

Glad you took no offense. DetlefK Jun 2016 #27

It is being universally panned by physicists. longship Jun 2016 #28

You're making my head hurt. nt cstanleytech Jun 2016 #19

Here's Sean Carroll on this rubbish. longship Jun 2016 #25