DaddleDew
@DaddleDew@lemmy.world
- Comment on Whales 14 hours ago:
As sound travels through a water layer where the speed through which it travels varies with depth, the sound will tend to refract towards where it is the slowest.
A layer where temperature decreases as depth increases will refract sound downwards. A layer that has the inverse temperature properties will do the opposite. A layer that is isothermal (where the temperature remains constant as depth changes), will still tend to refract sound upwards because the increase in pressure also increases velocity, although not as strongly as temperature does, which is why temperature differences can easily overcome this effect.
If you have a layer that refracts sound downwards on top of a layer that refracts sound upwards, you just created a sound channel, which acts as a wave guide in which sound will remain trapped and travel far longer distances horizontally before dissipating.
Ultimately you can’t really put a number on the required temperature differences because there are many other factors to take into account like how steeply the speed of sound changes, how tall the layer(s) are, what is the frequency of the sound, or how much of it you want to remain “trapped” in the sound channel.
- Comment on Anon learns that his grandfather dodged being drafted 1 day ago:
My grandfather did the exact same thing. But he was in conquered France and did it to avoid being drafted by the Nazis.
- Comment on Whales 1 day ago:
How well sound propagates through water is highly dependent on the water temperature variations over depth. There can be conditions in which sounds can be trapped between two different horizontal “layers” and travel far greater distances than 80km.
- Comment on The Final Frontier 2 days ago:
A lot of stock photos are ridiculous like that
- Comment on Anon is a test subject 2 days ago:
I’ve spent over a decade in the army where you’re taught to pride yourself into “embracing the suck” and the whole “pain is all in your head” mentality. I have now taken a different career path and realized that this kind of mentality is only useful in very specific cases and is otherwise very bad. But to this day I still tend to downplay and hide my problems/pain whenever things are wrong.
That nearly got me killed a year ago when I showed up at the ER with pulmonary embolism (likely caused by a COVID infection) and the doctor dismissed it because I didn’t look in pain enough for it to be that. The doctor sent me home untreated. It would have likely killed me had I not returned the day after to see another doctor who luckily took me seriously and got me a CT scan that revealed the problem.
- Comment on Terraforming 1 week ago:
“Let’s terraform Mars so that when we’ve reverse-terraformed Earth so bad that it becomes inhabitable, we will have somewhere to go.”
- Comment on Anon goes to the gym for the first time 1 week ago:
Actually strong people don’t need to belittle others around them to feel stronger.
- Comment on These notifications are bundled together for some reason. So if I want to be notified when my subscriptions renew themselves, I have to also be notified of random games going on sale, too. 2 weeks ago:
There should be a legal requirement to call a targeted advertisement a targeted advertisement. Calling them “recommendations” only makes these assholes feel emboldened to push ads where people wouldn’t normally accept them. Microsoft is pulling that dirty trick as well.
- Comment on Why don't electric car manufacurers put solar panels on the car roofs? 3 weeks ago:
I was about to say that. The main reason why they can do it is that Aptera went great lengths to make their vehicle as light and efficient as possible so what little charge they get out of the panels will make a noticeable difference.
This is a stark contrast with the other EVs on the market that are just huge heavy bricks on wheels that compensate for their inefficiency with bigger and heavier batteries.
- Comment on Team Fortress 2 3 weeks ago:
Scout.
Thrive at becoming the most annoying thing on the map to the enemy team.
- Comment on Anon is at a crossroads in life 4 weeks ago:
Plumbers make hand over fist if they’re good at their job. Many people get turned away by the “you deal with shit pipes” stigma so whoever sticks around are in huge demand.
- Comment on [deleted] 5 weeks ago:
Thanks for letting me know. Just blocked lemmy.ml from my feed.
- Comment on bugs 1 month ago:
That’s a typical case of someone who is so eager to sounds right in an argument that they will not bother double checking to see if they missed the original point or true meaning before replying.
There are a lot of people like that on Reddit. Well, I assume there still are I deleted my account a while ago. What a toxic place.
- Comment on Peer review can be fun 1 month ago:
Could it be some sort of meta joke where the review is reviewing itself?
- Comment on I love Juicero 1 month ago:
Actually it was underengineered. It was underbuilt in places where it mattered and overbuilt where it didn’t matter, using completely unnecessarily expensive materials and manufacturing processes and completely inefficient design.
It was like it was designed by an engineer who was fresh out of school with no understanding of real world cost effectiveness.
- Comment on Half Life 3 1 month ago:
What you are asking for is for Valve to start behaving like developers like EA and Activision, who keep milking the crap out of their franchises with one lazy generic release after the other for a quick cash grab until nobody cares about it anymore.
The fact that Gaben doesn’t force his employees to work on the game just to make money is the reason why Half-Life games are of such good quality. The employees at Valve work on what they are motivated to work on at the moment. They aren’t being given arbitrary deadlines from overhead either. This is how we got amazing games like Team Fortress 2 and the Portal games too. Both Half-Life games were major milestones in video game history by pushing the envelope and currently no Valve employees believe that the conditions are currently set for this to happen with a new Half-Life 3. It would never meet the hype if they tried right now and it would be a huge disappointment.
Half-Life 3 isn’t vaporware either as Valve openly admits that they are not working on it at the moment.
Just accept that great things can’t happen as often as we wished they did.
- Comment on trapped! 1 month ago:
In zero gravity this is a legitimate concern
- Comment on We're all a little crazy 1 month ago:
I’m pretty sure mine hates me and makes me so stupid stuff whenever I’m distracted.
- Comment on Anon misses a potential match 2 months ago:
What a predatory system
- Comment on How do you clean your razor? 2 months ago:
I rinse mine under the faucet, take the blade out and wipe it by pinching it between my fingers and wiping perpendicularly and AWAY from the cutting edge whike holding it under running water. Then I reassemble it, swirl it in a container of isopropyl alcohol, shake the excess off and set it to dry. The blades last much longer this way.
- Comment on Anon buys an air fryer 2 months ago:
I’ve had experience with convection ovens too and they still suck compared to an air fryer. I have no idea if the ovens with an “air fryer” function are any different to convection or if it is just a gimmick though.
- Comment on Anon buys an air fryer 2 months ago:
I’ve found that air fryers often make far better results than conventional ovens. Conventional ovens tend to cook things unevenly, will more easily burn some parts of the food, take more time to cook and dry things out.
You’ll never get homemade chicken wings as crunchy and juicy as you can get them in an air fryer in a conventional oven.
- Comment on Anon talks trash about S. Korea 5 months ago:
BUT…
You can get wasted with $1 worth of soju.
- Comment on This balloon we brought to decorate a 70th birthday party wasn't at all overshadowed by the ones left on display from the previous party. 6 months ago:
Change the small balloon for an “80” and the average will be correct.
- Comment on When Baldur's Gate 3 came out, Steam's overall bandwidth consumption went from around 18 Tbps to 146 Tbps 10 months ago:
At what point does it becomes cheaper to ship it to the buyer on a thumb drive?