Why do substances melt when heated while others solidify? |
- Why do substances melt when heated while others solidify?
- Why does plastic turn white when you bend it?
- To what extent do animals experience minor diseases like ‘the common cold’ or even other symptoms like fevers?
- How are highlighters made?
- If you could drive super fast towards or away from a radio station would you hear the music change pitch or speed from the Doppler affect?
- What factors cause absolute humidity to vary from day to day?
- What exactly do ants do when their home is disturbed? Are they just running about, or are they enacting out certain procedures/roles?
- Balloons & the energy value of helium?
- If you are on Mars would the constellations and star maps be similar to earth?
- How do waterfalls freeze over if the water is always moving?
- How do blind people’s bodies know when to produce melatonin and sleep?
- How do plants that mimic animals know what they look like?
- How many virus cells are needed to make a human ill?
- Why is it cooler at high elevations and warmer at low elevations?
| Why do substances melt when heated while others solidify? Posted: 16 Feb 2020 03:10 AM PST Eggs solidify when heated, cheese melts. Butter melts. Some substances can reliquify or resolidify but e.g. a solidified egg will stay solid. Why is that? [link] [comments]  |
| Why does plastic turn white when you bend it? Posted: 15 Feb 2020 04:45 PM PST |
| Posted: 16 Feb 2020 07:19 AM PST |
| Posted: 16 Feb 2020 06:06 AM PST
Should this be separated into multiple questions? Sources would be greatly appreciated. [link] [comments]  |
| Posted: 15 Feb 2020 04:18 PM PST |
| What factors cause absolute humidity to vary from day to day? Posted: 15 Feb 2020 07:01 PM PST I understand that relative humidity is a measure of moisture in the air and temperature (affecting as it does the absorptive capacity of the air). However, I'm interested to know what it is that makes the weather more or less absolutely humid. For instance, in my city (coastal, lots of water nearby) some days could be 20 degrees Celsius and 10% humidity; other days could be the same temperature but 90% humidity. What meteorological (or geographic?) factors cause this variance? [link] [comments]  |
| Posted: 15 Feb 2020 09:03 AM PST |
| Balloons & the energy value of helium? Posted: 16 Feb 2020 01:33 AM PST Balloons rise because of helium being lighter than air but where does the energy derive from that provides the lifting? Like- I get that the gases are different densities to each other but how does that translate into upward movement? [link] [comments]  |
| If you are on Mars would the constellations and star maps be similar to earth? Posted: 15 Feb 2020 02:15 PM PST |
| How do waterfalls freeze over if the water is always moving? Posted: 16 Feb 2020 12:07 AM PST |
| How do blind people’s bodies know when to produce melatonin and sleep? Posted: 15 Feb 2020 10:35 AM PST I know the body makes melatonin naturally when it gets dark but how would this work for a blind person? Would it just be more based off of the timing of their Circadian rhythm? Thanks! [link] [comments]  |
| How do plants that mimic animals know what they look like? Posted: 15 Feb 2020 09:29 AM PST |
| How many virus cells are needed to make a human ill? Posted: 15 Feb 2020 05:27 AM PST |
| Why is it cooler at high elevations and warmer at low elevations? Posted: 15 Feb 2020 09:56 AM PST This seems contradictory especially considering that warm air rises and cold air sinks. I've been wondering for a long time now. [link] [comments]  |
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