What is the body's conversion efficiency of energy stored in food to energy stored in fat, or energy available to do work with? |
- What is the body's conversion efficiency of energy stored in food to energy stored in fat, or energy available to do work with?
- Does boiling water in a low pressure atmosphere still kill pathogens?
- At what point does atmospheric friction from high speeds negate wind chill effects?
- What distance from the centre of the earth is an object's potential energy the greatest?
- Particles in Space.. is Space a gas?
- Is it possible to study fields in space rather than excitations of those fields?
- Why can't we make pacemakers that can withstand magnetic fields?
- If calcium is a metal, can it be used for things like electric circuits? Can it be smithed?
- Does the magnus effect still work underwater?
- Scramjets and Entropy - The reason for thrust?
- What happened to the Global Cooling scare of the 1980's?
- How do satellites survive in the thermoshere when they should melt?
- By what mechanism does the brain keep time?
- Do we know how many tons of CFC are in the atmosphere?
- A question about the relativity of velocity?
- What's to stop a spinning object surpassing the speed of light, if large enough?
- What's the state of current lithium-ion batteries and what improvements can we expect in for batteries in general in the short term?
- Question from my 4 year old sister, do other animals also get "Boogers"?
- How do we clear out dust/debris/lint that gets into our lungs from breathing?
- How does the brain produce chemicals like dopamine, serotonin, etc?
| Posted: 25 Nov 2017 01:08 AM PST For example, if I eat 1000 calories of sugar:
Bonus question:
Note: I am not a biologist, from my understanding ATP is the last form of energy muscles use, albeit I could be wrong. [link] [comments]  |
| Does boiling water in a low pressure atmosphere still kill pathogens? Posted: 24 Nov 2017 09:44 AM PST Reducing the atmospheric pressure will reduce the boiling temperature of water, so will boiling in low pressure still kill pathogens in the water? [link] [comments]  |
| At what point does atmospheric friction from high speeds negate wind chill effects? Posted: 24 Nov 2017 07:30 PM PST |
| What distance from the centre of the earth is an object's potential energy the greatest? Posted: 24 Nov 2017 11:19 PM PST As you move a rock further away from the centre of the earth you are increasing its potential energy. If I pick up a rock off of the ground and move it 10 feet up I've just added energy to the system. Now as you get further from the earth, the gravitational pull weakens by the a factor of 1/(distance)2. At what point is the rock at the sweet spot where it's potential energy is the greatest it can possibly be and moving further from the earth will reduce potential energy at that point? At what distance does the potential energy become near zero and the rock becomes "weightless?" [link] [comments]  |
| Particles in Space.. is Space a gas? Posted: 24 Nov 2017 06:12 PM PST Matter, in the form of a gas is when "the atoms or molecules in gases are more widely spaced than in solids or liquids and suffer only occasional collisions with one another." On sea level, one cubic cm of air has about 30 quintillion particles. Space, although often said not to, contains more than nothing. In our solar system, about there are about 30 particles per cubic centimeter. Can someone explain what these particles are? Considering how far apart the particles in our solar system are spaced from each other, would they be considered a gas? If not, what are they? Are these particles anything? What thing are they? What type of thing? Considering any of these question are a yes, would the Space we know be considered a mixture? [link] [comments]  |
| Is it possible to study fields in space rather than excitations of those fields? Posted: 25 Nov 2017 03:02 AM PST I was wondering if it is even theoretically possible if we can directly study and measure quantum fields that 'make' subatomic particles like the electron field. Rather than study the electron itself? Thanks in advance for the answers! [link] [comments]  |
| Why can't we make pacemakers that can withstand magnetic fields? Posted: 25 Nov 2017 04:32 AM PST The pacemaker sign is often found near strong magnetic fields. What's blocking us from making them non-sensitive to magnetic fields? [link] [comments]  |
| If calcium is a metal, can it be used for things like electric circuits? Can it be smithed? Posted: 24 Nov 2017 08:50 PM PST |
| Does the magnus effect still work underwater? Posted: 25 Nov 2017 03:13 AM PST |
| Scramjets and Entropy - The reason for thrust? Posted: 24 Nov 2017 06:23 PM PST I have taken Thermodynamics I and II in college. I was reading through my textbook and it said that there is a velocity drop in a supersonic flow stream when a heat transfer to that system occurs. If this is the case, how does it produce thrust? [link] [comments]  |
| What happened to the Global Cooling scare of the 1980's? Posted: 24 Nov 2017 09:13 AM PST Not that I don't believe in global warming or anything, but im just generally curious [link] [comments]  |
| How do satellites survive in the thermoshere when they should melt? Posted: 24 Nov 2017 09:06 PM PST |
| By what mechanism does the brain keep time? Posted: 24 Nov 2017 02:55 PM PST In every time-measuring device we have, we need mechanical parts that follow a certain rhythm to keep time, so wouldn't the brain also require some physical mechanism in order to perceive time? If so, how does that mechanism work? [link] [comments]  |
| Do we know how many tons of CFC are in the atmosphere? Posted: 24 Nov 2017 08:53 PM PST |
| A question about the relativity of velocity? Posted: 25 Nov 2017 06:17 AM PST If all movement is relative to some other reference point, then we could say that we are moving at near light speed compared to a particle in an accelerator. Instead of the particle coming towards us, we would be going towards the stationary particles at near light speed. If this is true, then why aren't we moving forward in time more slowly compared to the particles? According to the theory, objects that move faster in space experience time more slowly compared to other objects. In other words, time moves faster for slower objects. If anyone has some knowledge to share on this please do so because it is something that has been bugging me for a while now. [link] [comments]  |
| What's to stop a spinning object surpassing the speed of light, if large enough? Posted: 24 Nov 2017 06:15 PM PST Let's say you had a giant compass needle spinning in space. Diameter of the needle = 95,426,903.18 metres Spin circumference = 299,792,458 metres (the distance light travels per second). If it were to spin at >60rpm the ends of the needle would (on paper) surpass the speed of light. Can anybody explain what would actually happen? Would the needle be forced to bend, regardless of its material? [link] [comments]  |
| Posted: 24 Nov 2017 02:59 PM PST |
| Question from my 4 year old sister, do other animals also get "Boogers"? Posted: 24 Nov 2017 07:02 AM PST I was telling my sister that she shouldn't pick her nose in public, and somehow she asked me if our dog also couldn't. I told her that animals don't get them. She asked why and I had no idea, in fact I didn't even know if me saying that they don't get them was accurate. It's my understanding that "boogies" are dried muccus. When something irritates the lining of your nose, like dust, or powder, that muccus stops it. So, does the differing nasal cavity shape on other animals stop them from getting them? Do other animals lack that same muccus? [link] [comments]  |
| How do we clear out dust/debris/lint that gets into our lungs from breathing? Posted: 24 Nov 2017 02:51 PM PST As the question states, clearly we breathe in minute particles of dust everywhere we go that must build up over time. Is it all captured by the cilia lining our respiratory tract? But even if they were caught on the way down, there is no way of clearing it unless it's in the nose so how come after decades of living people don't have to clean out their lungs like they would a dusty old room? [link] [comments]  |
| How does the brain produce chemicals like dopamine, serotonin, etc? Posted: 24 Nov 2017 06:00 PM PST |
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