Heart monitors measure heartrate, is there a heart strength as well? Is there an advantage to faster weaker beats or slower stronger beats? |
- Heart monitors measure heartrate, is there a heart strength as well? Is there an advantage to faster weaker beats or slower stronger beats?
- Why can plastic only be recycled a few times while glass can be recycled indefinitely?
- Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology
- How do barometers measure altitude accurately when air pressure is constantly changing?
- How is it that there is a height difference between Pacific and Atlantic ocean?
- Why don't we know the size of the entire universe?
- What is the difference between P-wave (longitudinal) modulus of a material versus its Young's modulus?
- Is it possible to estimate the flashpoint of a mixture?
- I'm not sure where to ask this but maybe you guys can help, why do people refer to it as West Texas and Western Kansas? Is there a difference in West vs Western?
- Why are there no white sandy beaches up in the north?
- How common are blood clots as vaccine side effects?
- Why don't we inject immune cells like T cells or those that kill pathogens when the immune system is failing to defeat the pathogen?
- Do I need to wipe down everything I buy to decrease the chances of COVID infection?
- Could we not observe light from space in the form of a laser being shined at the moon?
- Lake Baikal growth: how is it measured?
- What happens inside our body that causes certain body parts to twitch?
- Could taking medicine to dampen a fever reduce the effectiveness of the immune system trying to protect the body?
- What happens underwater during a waterspout?
| Posted: 13 Apr 2021 08:00 PM PDT |
| Why can plastic only be recycled a few times while glass can be recycled indefinitely? Posted: 13 Apr 2021 06:39 PM PDT Specifically: why do the plastic molecules become shorter with each melting down/recycling (thus degrading the material) while glass molecules don't and can therefore be recycled an indefinite number of times without degrading? [link] [comments]  |
| Ask Anything Wednesday - Biology, Chemistry, Neuroscience, Medicine, Psychology Posted: 14 Apr 2021 07:00 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Biology, Chemistry, Neuroscience, Medicine, Psychology Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| How do barometers measure altitude accurately when air pressure is constantly changing? Posted: 14 Apr 2021 02:22 AM PDT Fitness watches or bike computers - probably some phones too - track altitude change via air pressure change, accurately enough down to the foot/metre. [link] [comments]  |
| How is it that there is a height difference between Pacific and Atlantic ocean? Posted: 14 Apr 2021 04:28 AM PDT I just can't figure out why, if they are interconnected by the strait of magellan at Kap Hoorn, why do they have to change height in the panama channel? [link] [comments]  |
| Why don't we know the size of the entire universe? Posted: 14 Apr 2021 01:39 AM PDT We know when it started and how fast it expands, so why are we unsure about how much 'space' there is beyond our observable universe? [link] [comments]  |
| Posted: 14 Apr 2021 04:43 AM PDT Studying Brillouin microscopy and these moduli can be very different. Can't seem to understand why the difference in their definition [link] [comments]  |
| Is it possible to estimate the flashpoint of a mixture? Posted: 13 Apr 2021 04:28 PM PDT If given the flash point of two known substances, is it possible to estimate the flash point of a mixture of both? To give a little background, I want to achieve a mixture with a flashpoint close to Coleman's fuel (-4°C) that when openly burnt should produce a visible flame. I was guessing that a mixture of gasoline (-40°C) and isopropyl alcohol (~12°C) could achieve that. But would it be possible to know the ratios with a linear interpolation or am I way off? Obviously it would be best to get some Coleman's fuel but it is not available in my country. [link] [comments]  |
| Posted: 13 Apr 2021 07:07 PM PDT I'm not sure what flair fits this. I live in the area and this question just popped into my mind. Maybe there's a better sub for this? [link] [comments]  |
| Why are there no white sandy beaches up in the north? Posted: 13 Apr 2021 08:22 AM PDT I'm thinking specifically about alaska and Canada, which seem to be exclusively pebble beaches, while the Caribbean is famous for white sandy beaches with a very fine sand. Why is this? [link] [comments]  |
| How common are blood clots as vaccine side effects? Posted: 13 Apr 2021 10:26 AM PDT I've seen that both the AstraZeneca and J&J COVID vaccines have blood clots as a side effect (https://www.nytimes.com/2021/04/13/health/blood-clots-johnson-vaccine.html https://www.cidrap.umn.edu/news-perspective/2021/04/studies-suggest-link-between-blood-clots-astrazeneca-covid-vaccine). I know that these two vaccines are using more traditional technologies (reengineered viral plasmids if I recall) and I haven't heard about any blood clots with the mRNA vaccines from Moderna and Pfeizer. It got me thinking. Are blood clots a known side effect in vaccines using traditional technologies? That is, are people more concerned now because it's being heavily covered by the media and are actually expected by reviewing the literature on what is known about these technologies. [link] [comments]  |
| Posted: 13 Apr 2021 07:43 AM PDT I am not from a medical background so please excuse me if this question is silly or uninformed. [link] [comments]  |
| Do I need to wipe down everything I buy to decrease the chances of COVID infection? Posted: 13 Apr 2021 08:46 AM PDT I've been wiping down everything I buy from groceries to books since the pandemic started. Yet I've recently been reading that fomite, or surface, transmission of the virus is low and can easily be mediated with hand washing. Are these data accurate? Is wiping down everything I buy necessary? Thank you all in advance for your time. [link] [comments]  |
| Could we not observe light from space in the form of a laser being shined at the moon? Posted: 13 Apr 2021 06:59 PM PDT Like a spacecraft observing the moon and the earth, with a high speed camera, measuring the speed it takes that light (in a vacuum) goes a set distance, say 300,000 meters from the surface of the Earth, to the time it takes to hit the moon. I say from a distance from the surface so that by that point we get light's speed in a vacuum. We have cameras that can see photons moving in a digestible format. Would we be able to do that and get a much closer approximation for the speed of light? [link] [comments]  |
| Lake Baikal growth: how is it measured? Posted: 13 Apr 2021 06:56 AM PDT Hi guys, I was watching a video of SciShow about lake Baikal ( https://www.youtube.com/watch?v=AjJUFyd4Cac ). At the very beginning of the video (min 1:07) they mention that the lake gets wider about 2cm annually. I have no doubt about the tectonic fact, however, I was wondering how can it be measure with such precision. Of course, my first thought was "well... using satellite you can compare one image to the other, yadah yadah", but talking about such large distances, and satellite images, measuring a difference of cm sound like a long shot. Maybe I'm wrong and is possible. [link] [comments]  |
| What happens inside our body that causes certain body parts to twitch? Posted: 13 Apr 2021 04:26 AM PDT |
| Posted: 12 Apr 2021 08:04 PM PDT |
| What happens underwater during a waterspout? Posted: 12 Apr 2021 11:07 PM PDT What would happen underwater during a waterspout? Would a whirlpool form under it? How far down would it go? Do fish and other see creatures know to avoid it? Would the effects be different depending on it was fair wether or tornadic? [link] [comments]  |
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