Why did they use black balls as opposed to white balls to cover the LA reservoir? |
- Why did they use black balls as opposed to white balls to cover the LA reservoir?
- Which specific advancements have led to the size decrease of household AC-DC adapters?
- Why is fructose so much sweeter than glucose?
- Does the sea build up heat over the summer, or does the temperature reset over night?
- How to make the biggest bubbles?
- How do they determine the calorie count and nutritional information for foods?
- How are scientists able to figure out that Greenland lost specifically 2 billion tons of ice this week?
- If you slice off a piece of skin with a mole, will the skin regrow without the mole on it?
- Where does the wax go when burning a candle?
- Do you know how spiders learn to weave their webs? innate wisdom or learned?
- Do cats purr voluntarily? Do they get tired of it?
- How is the body exposed to and harmed by radiation?
- How are we able to tell how animals sees things? e.g. a snake seeing in infrared or a mantis shrimp seeing more colors than a human can
- Why do they use hair for drug samples?
- How do you estimate attendance numbers for events like political protests?
- How do we know about other galaxies?
| Why did they use black balls as opposed to white balls to cover the LA reservoir? Posted: 16 Jun 2019 05:17 PM PDT Since the reason for covering the surface in the first place seem to be to reduce evaporation. Would it not make more sense to cover it with something white instead of black? [link] [comments]  |
| Which specific advancements have led to the size decrease of household AC-DC adapters? Posted: 16 Jun 2019 03:16 PM PDT In the last 15-20 years AC-DC chargers and power adapters have shrunk significantly with many offering substantially higher power output. I have an older iPod charger (pre-iPhone) that is as big or even bigger than the current crop of MacBook chargers and it outputs a measly 2.5W and the current phone chargers are much smaller and can do 10W at least with fast chargers going much higher. [link] [comments]  |
| Why is fructose so much sweeter than glucose? Posted: 16 Jun 2019 11:10 AM PDT It's similar to glucose by structure, but vastly differs in taste. Fructose is almost two times sweeter than even sucrose! I can't find any concrete theories, so what are your thoughts? [link] [comments]  |
| Does the sea build up heat over the summer, or does the temperature reset over night? Posted: 17 Jun 2019 01:57 AM PDT 📷 I went to see my sister in Brighton (UK) on an unexpectedly hot day in May. I decided to go for a swim in the sea - my brother declined saying the sea hadn't heated up enough so he would wait until the summer My understanding of heat entropy is that the sea doesn't "heat up" over time like a slow cooker but has a temperature directly relating to the daily sun heat in a given area My question is this: does the sea water heat over time or does the sea temperate depend on daily heat from night time (cold) to whatever sun temperature creates on any given day despite time of year? Thank You in advance my science friends !! [link] [comments]  |
| How to make the biggest bubbles? Posted: 16 Jun 2019 08:55 AM PDT Soap bubble wiki and various big-bubble fans have a million opinions and receipe variations to make the best big-bubble juice, but there are so many variables it feels like 50% trial and error, 50% cargo culting. Is there a scientific prediction of what should make the biggest bubbles? Too many variables:
Edit for /u/freespeechenthusiast: What is a "bubble"? Good question. I mean I, an evil mad scientist, after petting my white cat and cursing Inspector Gadget, declare that the only way to stop my doomsday machine is with a huge bubble. The scientists find a big bucket of H2O, a water filter, a refrigerator, water heater, jars bowls and whisks, Amazon's infamous 50 gal drum of J-Lube, guar gum, baking soda, corn syrup, various types of string, and a humidity/temp/wind speed Nest thermostat, and start to get all Apollo 13 on it. How big should the size threshold be to maximize my bubble to doomsday machine ratio and what do knowledgeable chemists think the ideal mix would be? [link] [comments]  |
| How do they determine the calorie count and nutritional information for foods? Posted: 16 Jun 2019 03:31 PM PDT |
| Posted: 16 Jun 2019 10:32 PM PDT The amount of ice lost is according to the CNN article released 6/15/2019 How exactly are they able to calculate that it was 2 billion tons of ice and not something like 2.5 billion or 1.5 billion? How accurate is this estimate? [link] [comments]  |
| If you slice off a piece of skin with a mole, will the skin regrow without the mole on it? Posted: 16 Jun 2019 06:04 AM PDT |
| Where does the wax go when burning a candle? Posted: 16 Jun 2019 05:11 PM PDT |
| Do you know how spiders learn to weave their webs? innate wisdom or learned? Posted: 16 Jun 2019 08:23 AM PDT |
| Do cats purr voluntarily? Do they get tired of it? Posted: 16 Jun 2019 03:25 AM PDT |
| How is the body exposed to and harmed by radiation? Posted: 16 Jun 2019 09:22 PM PDT I am confused with how we protect ourselves from radiation using things like hazmat suits. I understand radiation is energy given off by decaying particles but how does just an airtight suit stop that? Does coming into physical contact with some irradiated material have a greater effect than being in an irradiated area? I feel as if there is some information I am missing or don't understand as to how radiation affects us and how we protect ourselves. Cheers! [link] [comments]  |
| Posted: 16 Jun 2019 01:41 AM PDT |
| Why do they use hair for drug samples? Posted: 16 Jun 2019 05:57 AM PDT Hello! I have been reading about drug misuse tests that the police do. Why do they use hair samples to see if a person has taken drugs or not? [link] [comments]  |
| How do you estimate attendance numbers for events like political protests? Posted: 16 Jun 2019 09:34 AM PDT I've been reading that the estimated number of people out in the Hong Kong protest is around 2 million people. But I was wondering how do they arrive at that number when you don't have things like ticket sales to rely on? [link] [comments]  |
| How do we know about other galaxies? Posted: 16 Jun 2019 04:34 AM PDT |
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