If identical twins have the exact same DNA, why do they often look slightly different than one another? |
- If identical twins have the exact same DNA, why do they often look slightly different than one another?
- Why were floppy disks 1.44 MB?
- What causes the octet rule?
- Is it possible for a planet in a binary system to have a figure 8 orbit that encircles both stars?
- What's the difference between anti-derivatives and integrals?
- Do any animals other than humans have "bad habits", or do things they may know are deliberately bad for them?
- If you have two horseshoes and line up their centre of masses exactly why aren't the gravitational forces between them infinite?
- In a 2D coordinate system, x is horizontal and y is vertical. Is there a convention for which axis is which when projecting a 3D coordinate system in 2D?
- Did we develop the tongue for advanced speech or did we developed advanced speech out of the tongue?
- Why do small parabolic dishes (I'm talking about sound waves, not light) have poor low frequency response?
- Footprints on the moon Destroyed by seismic activity?
- In beta decay, what causes an up quark to change into a down quark to change a proton into a neutron or vice versa? Why do they do this?
- Did the terrorist attack on 9/11/01 inspire any changes in how very large or tall structures are designed?
- Is there a limit to the amount of potential/kinetic energy an object can contain?
- Why is it that toothpaste and other minty things alter the tastes of foods such as oranges, but don't alter other foods such as bread?
- Hearts can pump for decades without stopping. Could a person walk/hike for tremendous distances if leg muscles were similarly composed? What kind of energy and other demands on the body would this take?
- If we have a blood brain barrier, how do SSRIs effect the reuptake process of serotonin?
- Can a material be heated enough to emit blue light from black body radiation?
- Why don't eyebrows/eyelashes grow like normal hair?
- When we break a bone, will it be stronger or weaker when it is repaired?
| Posted: 13 Sep 2016 03:23 PM PDT |
| Why were floppy disks 1.44 MB? Posted: 13 Sep 2016 03:42 PM PDT Is there a reason why this was the standard storage capacity for floppy disks? [link] [comments]  |
| Posted: 13 Sep 2016 02:34 PM PDT It's commonly taught that the octet rule can be used as a general rule of thumb for defining why atoms behave the way they do to fill their valence shells. But what is the actual reason for this behavior and why is an s-orbital and a p-orbital defined as a full valence shell? [link] [comments]  |
| Is it possible for a planet in a binary system to have a figure 8 orbit that encircles both stars? Posted: 13 Sep 2016 08:13 AM PDT |
| What's the difference between anti-derivatives and integrals? Posted: 13 Sep 2016 05:21 PM PDT Just started Calculus, and I'm wondering what the difference is. To me they seem very similar. [link] [comments]  |
| Posted: 13 Sep 2016 02:57 PM PDT I don't know what the animal kingdom version of smoking cigarettes is, but something along those lines. [link] [comments]  |
| Posted: 13 Sep 2016 02:24 PM PDT Considering a horse shoe's centre of mass is actually outside of it so you could line two up. F=(Gm1m2)/(r2 ) surely you would be dividing by zero so the answer would be undefined? [link] [comments]  |
| Posted: 13 Sep 2016 02:11 PM PDT For example, Wikipedia has this, which shows y as horizontal, z as vertical, and x as depth. To me that choice seems needlessly inconsistent with the 2D coordinate system. Would it not be better to keep x and y like in 2D and make z the depth? Is there a convention for this? If so, is there a rationale behind that convention? [link] [comments]  |
| Did we develop the tongue for advanced speech or did we developed advanced speech out of the tongue? Posted: 13 Sep 2016 02:31 PM PDT What I'm asking is, is advanced speech a random occurrence due to humans develop a tongue for eating, or was the tongue formed to make communication easier? [link] [comments]  |
| Posted: 13 Sep 2016 02:21 PM PDT I can understand that parabolic dishes are transparent to light whose wavelength is bigger than the diameter of the dish. But what about sound? Sound is quite unlike light. It's just a mechanical wave of pressure and I don't see why low-frequency sound cannot be focused by a small parabolic dish. Here's a little thought experiment. Imagine a long cylindrical tube and a reflective parabolic dish of the same diameter placed in the middle of the tube. The dish fits perfectly into the tube. A plane sound wave whose wavelength is bigger than the diameter of the dish is emitted at one end of the tube. Does the dish focus the wave? The sound has nowhere else to go and the dish is reflective. What happens to the wave? The energy cannot disappear. [link] [comments]  |
| Footprints on the moon Destroyed by seismic activity? Posted: 13 Sep 2016 01:08 PM PDT If there is seismic activity on the moon that can last up to an hour would the footprints that we are told will be there forever be flattened out and destroyed by Lunar quakes [link] [comments]  |
| Posted: 13 Sep 2016 10:55 AM PDT I understand that the whole thing occurs due to the weak nuclear force to make, the nucleus more stable but what causes the quark to change? How does it know if it should flip or not? Thankyou. E: Example in title is Beta plus decay I know [link] [comments]  |
| Posted: 13 Sep 2016 10:30 AM PDT |
| Is there a limit to the amount of potential/kinetic energy an object can contain? Posted: 13 Sep 2016 12:55 PM PDT I've always heard that as an object approaches the speed of light, the energy required to further approach that limit increases asymptotically to infinity. So I'm curious, given a functionally unlimited amount of time and available thrust, is there an upper limit to the amount of energy an object can 'contain'? [link] [comments]  |
| Posted: 13 Sep 2016 09:23 AM PDT I'm drinking some fresh squeezed orange juice this morning minutes after brushing my teeth. It's so tart I'm having a hard time drinking it. However, my slice of toast hardly changed in terms of taste except for the subtle backdrop of mint. What is it about mint that changes your tastebuds and make orange juice so tart tasting? [link] [comments]  |
| Posted: 13 Sep 2016 08:01 AM PDT If other muscles in the body were replaced somehow (methods unknown) by heart muscles, would they have the same ability to function tirelessly? [link] [comments]  |
| If we have a blood brain barrier, how do SSRIs effect the reuptake process of serotonin? Posted: 13 Sep 2016 02:33 PM PDT |
| Can a material be heated enough to emit blue light from black body radiation? Posted: 13 Sep 2016 12:05 PM PDT A hot enough black body emits blue light, like blue stars. Can terrestrial materials be heated hot enough to be visibly blue, say a furnace or a molten metal? I've never seen an example of this. [link] [comments]  |
| Why don't eyebrows/eyelashes grow like normal hair? Posted: 13 Sep 2016 09:45 AM PDT |
| When we break a bone, will it be stronger or weaker when it is repaired? Posted: 13 Sep 2016 08:09 AM PDT All is in the title, I broke my bone when I was around 7 and I still feel like Its weaker than before and still hurts when I put much effort on it (Im 18) Some people say me the opposite; that their bone is now stronger, so I dont really know, could you help to find an answer? :) [link] [comments]  |
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