Why is it harder to send a spacecraft to the Sun than away from the Sun? |
- Why is it harder to send a spacecraft to the Sun than away from the Sun?
- What are the moles on our skin for?
- What determines whether water in clouds form ice crystals (snow) or chunks (hail)?
- Why did Einstein abandon the Cosmological Constant?
- If radio waves lose power following an inverse square law, how are we able to pick up signals from the New Horizons probe from almost 4 billion miles away?
- How does the nozzle know to shut off when my gas tank is full?
- Can we ever reach 0 degress Kelvin?
- Is there an upper limit to how hot something can be?
- Possible to change the temp of a liquid by stirring?
- How can there be loose boulders on an asteroid?
- How does water get inside coconuts?
- What is an itch?
- What causes the puddle-like reflections on the road ahead of you when you're driving?
- Why are some people lefty and others righty. Are there people that are naturally born ambidextrous?
- Why do classical objects behave classically and not quantumly?
- Is The Universe The Same Age Everywhere?
- Does your body sweat if you are underwater?
- Do Queen bees choose the best and most fit partners to breed with?
- What was the thought-process behind the layout of the computer keyboard?
- Does the center of mass always coincide with the center of gravity? If they do why aren't they treated as a single entity?
- Why is acid rain not really a thing anymore?
| Why is it harder to send a spacecraft to the Sun than away from the Sun? Posted: 11 Aug 2018 01:18 AM PDT Stupid me thinks the gravity would help. Smarter than me says physics knows why. [link] [comments]  |
| What are the moles on our skin for? Posted: 10 Aug 2018 08:12 AM PDT |
| What determines whether water in clouds form ice crystals (snow) or chunks (hail)? Posted: 11 Aug 2018 06:13 AM PDT |
| Why did Einstein abandon the Cosmological Constant? Posted: 10 Aug 2018 09:32 AM PDT When Hubble discovered conclusively that the Universe was expanding, developing the first estimate of the Hubble Constant, Einstein abandoned the Static-Universe-Causing Constant introduced into his equations. Why did he not just change the value of it to account for the expansion, and therefore predict what we now call Dark Energy? Was this because the universe was thought to be expanding at a constant rate, as opposed to the now suspected Accelerating rate; a solution to which his equations could provide (sans Lambda) ? In Hubble's original model he determined that further galaxies were moving away faster (and therefore accelerating) - is this value is the Hubble Constant? Am I correct in thinking that an accelerating expansion means a constantly changing Hubble Constant? Last question: What caused/causes the farther galaxies to move away faster - why are they not moving away at a static rate (before we realized the accelerating expansion)? [link] [comments]  |
| Posted: 10 Aug 2018 09:42 PM PDT The transmitter on the probe can't be that powerful, right? You'd think the signal would get lost in the background radio noise of the universe. [link] [comments]  |
| How does the nozzle know to shut off when my gas tank is full? Posted: 10 Aug 2018 03:08 PM PDT I imagine it would have a sensor that would know when liquid touched it, but how would that work? Whenever I go to the gas station, it's usually just a metal nozzle attached to a hose... [link] [comments]  |
| Can we ever reach 0 degress Kelvin? Posted: 10 Aug 2018 11:15 PM PDT I was watching a video on Linus Tech Tips showing a quantum computer. He said that the unit gets down to .015 Kelvin. What ways could we achieve 0 degress Kelvin, and if it's not possible why? Also, why does a quantum computer need to operate at such a low temperature? [link] [comments]  |
| Is there an upper limit to how hot something can be? Posted: 10 Aug 2018 06:49 PM PDT We all know there is an absolute minimum temperature, is there an absolute maximum? I just read something that stated the LHC created a plasma that was 5.5 trillion C, albeit for a minuscule amount of time. I can't wrap my mind around that. [link] [comments]  |
| Possible to change the temp of a liquid by stirring? Posted: 10 Aug 2018 10:17 PM PDT My understanding of temperature is that it is a function of the average kinetic energy, or vibrational amplitude (frequency?), of the atoms or molecules of a substance. If this is correct, is it possible to measurably change the temperature of a liquid by stirring it fast enough? [link] [comments]  |
| How can there be loose boulders on an asteroid? Posted: 10 Aug 2018 06:13 PM PDT |
| How does water get inside coconuts? Posted: 10 Aug 2018 02:12 PM PDT |
| Posted: 10 Aug 2018 12:24 PM PDT |
| What causes the puddle-like reflections on the road ahead of you when you're driving? Posted: 10 Aug 2018 01:51 PM PDT |
| Why are some people lefty and others righty. Are there people that are naturally born ambidextrous? Posted: 10 Aug 2018 01:37 PM PDT |
| Why do classical objects behave classically and not quantumly? Posted: 10 Aug 2018 02:00 PM PDT Seeing as visibly large objects are a collection of smaller systems that behave quantumly, how come as a whole these large objects do not behave quantumly? [link] [comments]  |
| Is The Universe The Same Age Everywhere? Posted: 10 Aug 2018 09:09 AM PDT I tried asking this question before and got shot down and dismissed with some nasty comments. I think it may have been that I either didn't explain myself well enough or give a good example. I think I came across a good example that would explain what I'm getting at quickly and concisely. In the movie Interstellar there was a planet they named "Miller's Planet" which was a water world that was in a stable orbit very close to the supermassive black hole they named Gargantua. When they went down to that planet and then returned to their main ship, while only a few hours had passed for them, something like 23 years (I may be wrong about how many years) had passed at their main ship. This was because of the warp in space-time caused by Gargantua. Now, supposing that Miller's Planet had been in orbit around Gargantua for quite a while, say something like how long Earth has been around, 4.5 billion years, would the age of the universe be the same to a civilization that arose on a planet like Miller's as it is to us here on Earth? Which brings about the more fundamental question: is the universe the same age everywhere, if you were able to somehow take a consensus of numerous places in the universe simultaneously? Could other factors, such as space being created within the universe, compress or stretch time so as to make notable differences in whole regions of the universe? [link] [comments]  |
| Does your body sweat if you are underwater? Posted: 10 Aug 2018 11:02 AM PDT |
| Do Queen bees choose the best and most fit partners to breed with? Posted: 10 Aug 2018 05:17 PM PDT Do the Queens reject some bees that are, for example, smaller and trying to mate with her? I realize pretty much all of the bees look the same, (besides drones, babies, etc) but some bees can be born with slightly different genetic makeup, like every other living thing? Does she try to spot out the best genetic partner? [link] [comments]  |
| What was the thought-process behind the layout of the computer keyboard? Posted: 10 Aug 2018 03:35 PM PDT |
| Posted: 10 Aug 2018 06:47 AM PDT |
| Why is acid rain not really a thing anymore? Posted: 10 Aug 2018 07:43 AM PDT It seems like in elementary school we learned about acid rain and how it was kinda common but I haven't seen a single report on it irl. [link] [comments]  |
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