If you picked a random spot in the middle of the ocean would it be teeming with life? Or are there huge dead zones with no fish around? |
- If you picked a random spot in the middle of the ocean would it be teeming with life? Or are there huge dead zones with no fish around?
- Do other primates also have human-like circadian sleep rhythms, or do they sleep more, less, more intermittent?
- Was there ever a period in Earth's history when there were no deserts?
- Why do proposed Covid-19 vaccines have to be stored at very cold temperatures?
- Is the earths core directly in the centre of the earth?
- Why do more efficient rocket engines provide less thrust?
- Why does the flu vaccine need to be injected?
- Could smallpox come back?
- What causes a brief flicker of the power vs a long power outage?
- Obesity & COVID-19: Why does CDC data show obesity as a comorbidity on just 3.6% of Covid-19 deaths, yet numerous articles and studies continue to indicate it as one of the top conditions influencing negative Covid-19 outcomes?
- Why does a flight from London to Amsterdam take almost half an hour longer than a flight from Amsterdam to London?
- How are antibodies replenished?
- Is the field E produced by a charge q continuous?
| Posted: 04 Sep 2020 08:32 PM PDT |
| Posted: 05 Sep 2020 03:35 AM PDT |
| Was there ever a period in Earth's history when there were no deserts? Posted: 04 Sep 2020 09:56 AM PDT |
| Why do proposed Covid-19 vaccines have to be stored at very cold temperatures? Posted: 04 Sep 2020 10:59 PM PDT |
| Is the earths core directly in the centre of the earth? Posted: 05 Sep 2020 12:54 AM PDT So the Earth has a molten core, I know that, but is it stationary and is it directly in the centre of our lovely oblate spheroid? [link] [comments]  |
| Why do more efficient rocket engines provide less thrust? Posted: 04 Sep 2020 06:47 PM PDT RP-1 provides lots of thrust but have low efficiency. Hydrogen provides less thrust than RP-1 buts it's the most efficient chemical fuel. NERVA and Ion engines are the most efficient sources of propulsion we can make but can only be used in space because it gives off so little thrust. Rocket fuels are most efficient the faster the engine can shoot it out the back. But why does higher efficiency mean lower thrust? TL-DR: How come an ion engine can't put a Falcon 9 into space? [link] [comments]  |
| Why does the flu vaccine need to be injected? Posted: 04 Sep 2020 10:12 AM PDT |
| Posted: 04 Sep 2020 10:39 AM PDT I know smallpox is gone for now, but could it come back in different forms? If so, how does that happen/work? [link] [comments]  |
| What causes a brief flicker of the power vs a long power outage? Posted: 04 Sep 2020 01:24 PM PDT |
| Posted: 04 Sep 2020 06:53 PM PDT Numerous articles and reports indicate how obesity plays a serious role in exacerbating Covid-19. For example: "People with obesity are much more likely to be diagnosed with the novel coronavirus, undergo hospitalization and ICU admission, and die." https://www.medscape.com/viewarticle/936790 However, in the CDC data on deaths from Covid-19, obesity is listed as a comorbidity in only 3.6% (6059 deaths out of 169k) of these fatalities. https://www.cdc.gov/nchs/nvss/vsrr/covid_weekly/index.htm?fbclid=IwAR2-muRM3tB3uBdbTrmKwH1NdaBx6PpZo2kxotNwkUXlnbZXCwSRP2OmqsI#Comorbidities What am I missing here? Can someone please explain this apparent discrepancy? [link] [comments]  |
| Posted: 04 Sep 2020 08:19 AM PDT |
| How are antibodies replenished? Posted: 04 Sep 2020 11:16 AM PDT My understanding is that when the organism is exposed to a virus (or a vaccine) it produces antibodies, that kill the virus. The antibodies stay after the virus is defeated, protecting from reinfection (am I correct so far?) So what happens next, when the organism isn't exposed to the virus for a while? Are antibodies continuously produced to maintain the immunity? Or does the production stop and so the immunity only lasts until antibodies decay/flush out from the body? [link] [comments]  |
| Is the field E produced by a charge q continuous? Posted: 04 Sep 2020 07:23 AM PDT Not the charge itself, but rather the field E it produces. And if so, what's the smallest area of space a field can be considered to have one value. If answered, what's the highest\lowest value the field take in that area? [link] [comments]  |
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