Rory Alsop

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bio	website	infosecfrog.blogspot.com
	location	Scotland, United Kingdom
	age	41
visits	member for	2 years, 2 months
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	2,001 reputation	bio	website	infosecfrog.blogspot.com	visits	member for	2 years, 2 months
721 badges		location	Scotland, United Kingdom		seen	2 days ago

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Nov 7	comment	What else does the fabric of space-time do? @Nick1o2 - I think you might need to revisit what you understand by 'fabric of space time.' It isn't actually a thing, it is a term writers use to try and help the lay-person understand some of the aspects of physics which aren't necessarily intuitive.
Oct 12	comment	what would my path look like using the sun for navigation Correct, in fact it only will twice a year.
Sep 28	comment	Is Earth's orbit altered by recoil from take-off/launch/recovery of aero/space vehicles? The simple answer is yes. By an incredibly small amount, especially as most of the mass returns to earth.
Sep 6	comment	Infinite Energy from Bobbing sorry @JohnK - not going to bother - it is way too trivial. Look up any description of real world losses in dynamic systems.
Sep 5	comment	Infinite Energy from Bobbing very simply - neither of your equations is true in the real world. You need to add in a term for losses such as friction in the rubber of the balloon, turbulence in the air when it is moving past balloon or propellor etc etc etc
Sep 5	comment	Infinite Energy from Bobbing no, I'm bringing my common sense to bear: everything costs energy.
Sep 2	comment	Infinite Energy from Bobbing no- no there shouldn't. every process loses some energy in heat, turbulence, drag etc. so you will never generate more potential energy.
Aug 18	comment	What is physics of a normal jump? Can you explain what you mean? What kind of jump? If one exactly like in your image, what part of it is mimportant? There are a lot of aspects to take into account, so if you can give context that would help.
Aug 8	comment	If the universe is infinite, shouldn't I already have been contacted by a time and space travelling doppelgänger? I read the q but like I said your linkage between paragraphs three and four doesn't work for me.
Aug 8	comment	If the universe is infinite, shouldn't I already have been contacted by a time and space travelling doppelgänger? Infinite doesn't have to mean everything happens. Infinite is weird like that. Time travel may be a physical impossibility - an infinite universe won't change that.
Jun 23	comment	How does one measure velocity in space? Okay - so just measure relative to whatever you are wanting to use as a reference point. If you want it relative to you, you could use a laser doppler measuerment. If you want Beagle's speed relative to a point on Mars, just measure it the same way you would on earth: triangulation
Jun 23	comment	How does one measure velocity in space? Why do you think velocity should be connected to Earth? The definition doesn't mention Earth at all- Definition: Velocity is a vector measurement of the rate and direction of motion.
Jun 11	comment	Finding instantaneous speed in MPH given acceleration, RPM and gear ratio There you go @Alexander - I couldn't find any specific issue with the previous website, but happy to change.
Jun 7	comment	Do you pay more for gas when the day is warmer? But your engine is much more efficient with cold air - as it is more dense. Wonder where the two curves would balance out :-)
Jun 3	comment	Why do rockets accelerate fastest horizontally? But surely you need to take the most obvious case - which is from zero to x seconds. If you take too long, the rocket will have hit the ground (as per your answer) and as that will happen relatively rapidly, terminal velocity is not really going to become a major factor here.
Jun 3	comment	Why do rockets accelerate fastest horizontally? But you will also hit terminal velocity in the other directions as well. It will just take longer as acceleration is lower.
Jun 3	comment	Why do rockets accelerate fastest horizontally? QI does get things wrong - sometimes they admit their mistakes on later shows, other times they don't. :-)
May 24	comment	Crushing a magnetic field and the field density would increase :-)
Apr 28	comment	Why are there more vertical takeoff than horizontal for spacecrafts? Yes, but they couldn't do it successfully, which is why it is only recently beginning to work.
Apr 28	comment	Energy and Matter I really think this needs to go to Physics - especially with the imminent demise of Astronomy. The physics guys would be able to give very straightforward answers on the interchangeability of energy and matter.