How to Survive a Plane Crash, According to Science

If you find yourself going into a freefall inside a metal tube, hurtling through the clouds at hundreds of kilometers per hour, and an oxygen mask drops down right in front of you – try not to panic. Airplane crashes are highly survivable. And here’s what you can do to increase your chances of survival…Taking a flight on a commercial airplane is about as risky as riding an escalator. The odds of being killed in a plane crash are 1 in 11 million. You’re more likely to drown in a bubble bath, choke on your breakfast, or…die in a car accident on your way to the airport. Yet, we can all feel a little nervous when stepping on a plane. Here are 6 things you can do to survive a plane crash. Your flip-flops may be comfy, but they’re not going to perform well in case of an emergency. And neither will your high-heeled shoes.

The National Transportation Safety Board reports that 68% of passengers in plane accidents die from injuries in post-crash fires.



So go for long pants and long-sleeved shirts – they’ll protect you from flames and sharp objects. And put on lace-up shoes, in case you need to run. Where is the safest place to sit, anyway? According to an analysis of airplane crashes by Popular Mechanics, your best bet is to sit as far back in the airplane as possible.

Unless the plane goes down tail-first. You see, there is no such thing as the safest seat on a plane. It all really depends on the situation.

Regardless of what section you’re sitting in, know where the emergency exits are. When you get on the plane, count the rows to the closest one so that you can find it even if the cabin is filled with smoke.

The first three minutes after takeoff and the eight minutes before landing are the most accident-prone times of the entire flight. Make sure to keep your shoes on, your seatbelt fastened and your tray table up. Put your carry-on items under the seat in front of you. You know why? To keep your legs from going under the seat and getting broken.

And pay attention to the emergency instructions, even if you’ve been on a plane many times before – not all planes are the same.

The first 90 seconds of a plane crash are the most important. Many people get so nervous they forget how to unbuckle their seatbelt. Listen carefully to the instructions. But don’t just sit through the disaster waiting for orders if they are not coming.

The first thing you should do is to prepare for impact. Bend over, grab your legs behind your knees and keep your head down. In the worst-case scenario, the cabin will experience sudden pressure loss and oxygen deficiency. You’ll only have about 10 seconds before you go unconscious. So if you see the oxygen masks drop down, put one on yourself first.

Only then should you try to help someone else. If you get to evacuate from the plane, do it as quickly as possible. Don’t try to get your carry-on to take with you – in the time you waste, you might end up getting stuck with it on a burning plane. If your plane hits the ground, there’s a high chance of it exploding. Run – at least 150 meters (500 feet) away from it in the direction against the wind and wait for the rescuers to find you.

It’s good to be prepared for anything. But don’t be afraid of flying. In the history of aviation, it’s never been a safer time to fly. Commercial aviation averages less than 500 fatalities per year worldwide. Among planes that do get into accidents, over 95% of the passengers get out of them alive.

Personally, I try to think of turbulence like bumps on the road. Helps with my flying anxiety. That’s a little tip from me to you. Stay tuned for another how to….

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9 Easy Tips to Become a Better Driver

 

Now here are some quick questions for you what damage can a sent sticker caused to your car why is it crucial to use turn signals even in a parking lot and can you use a log instead of a car wheel get ready here comes another lineup of Auto tips every driver has to know counting down from number nine using turn signals when finding parking places is or at least should be something that’s almost a natural instinct but do you ever do it when backing out of a parking spot if you’re wondering why that would be necessary the answer is simple safety other drivers and pedestrians aren’t psychic so they have no clue which way your back end will go so use your back left turn signal when backing out to the left and the right one when you’re going.

In the opposite direction once you’ve finished the maneuver and are ready to hit the road just signal as you normally would number eight many older cars have a gas pump it pumps fuel out of the tank and into the carburetor in there it gets mixed up with air and then gets burned off in the engine sometimes your car just won’t start and one of the reasons for that is problems with your gas pump it can wear out or weaken with time but there’s a trick to make it work take the key out of the ignition then turn it on again but don’t start the car right away wait for a couple of seconds to let the pump do its job and only then start the vehicle number seven in case you’re looking for a way to save some cash consider a DIY windshield cleaner if you think.

Of it the main enemy of your windshield is grease you get it from hundreds.

Of cars constantly moving in front of you cars are always leaking different kinds of fluid engine oil transmission fluid antifreeze brake fluid and whatnot whenever it rains they mix up with puddle water and then your car gets splashed so what normally helps you get rid of grease bingo it’s the dishwasher so take a spray bottle fill it with water in about two tablespoons of dishwashing soap and voila you just got yourself an effective and basically free windshield cleaner when you spray it on try to stick to the windshield and don’t go over the paint job since it might wipe it off oops number six in the white winter season never ever use a brush to clean snow off your vehicle if it’s really heavily covered with snow you can brush off the top layer and remove the snow from the windshield and mirrors to have enough visibility but don’t brush the snow off the car body because.

It scratches the paintwork to keep your vehicle bright and shiny exercise patience and wait till it thaws if there isn’t a lot of snow start it and let it thaw out if there’s a lot of snow reduce it to a thin layer and the rest will fall off by itself as you start moving for your own safety and the safety of others never hit the road if you can’t see where you’re going number five there’s another winter trick that will save you a good deal of frustration sometimes as you’re driving on a snowy day you can feel your steering wheel and wheels vibrating stop and take a look at the wheel disk sometimes as you pass through a snowdrift snow sticks to the disc and then because of moisture or rain it turns to ice it can stick on the inside of the disc and that massive piece of ice on the wheel can make it vibrate while you’re driving it’s not safe of course.

And can pull you to the side of the road or make your steering wheel shake so if that happens stop and kick the wheel with your foot to beat off the snow if that doesn’t help and your steering wheel is still vibrating see a mechanic [Music] number four when you’re driving down a highway or a country road little pebbles might come flying your way they aren’t that dangerous and you might not even notice the damage but if you look closely you can find small scratches on your headlights if you plan to stay on the road for a long time and rain catches you on the way your headlights might fog up because.

Of that damage they’ll need to be repaired but in the meantime use a piece of transparent adhesive tape it will prevent the moisture from getting in through the gap and the headlights from fogging up number three don’t use air fresheners that are sent stickers you must be wondering what kind of damage that cute little sticker could do to your dashboard air conditioner or wherever you stick it the active chemical components that make your car smell like an ocean breeze or the tropics can damage.




The paint or make it dull if for example your car stays in the Sun for too long and they spill they can cause some serious damage even if it just remains stuck as it should the evaporation of this liquid over months can leave a stain the paint will fade or get bubbling if you’re looking for a safe scent sticker alternative you can actually make one yourself fill a mason jar with baking soda about two-thirds fall then add 20 drops of whatever essential oil you prefer cover it with a lid and shake it well to mix take off the lid and then cut out a cardboard piece to match the size of the lid stick it to the jar using the ring part of the lid poke some little holes in it and it’s ready you can put it in the cup holder or somewhere under your seat it should last you a month number two if your vehicle suddenly fills up with unpleasant odors that your AC sucked.

In or one of the passengers accidentally produce your air freshener might not help and you’ll want to do the old-school way remember one thing though when you air out the vehicle open the windows that are kiddie Korner to each other for instance open the driver’s seat and the right rear window if you just open the front windows the air will blow back and spin but the stinking smell won’t disappear if you open all the windows on the same side the air will get in through the front window and go back out the back one and as you air out the car slow down a bit to save your hairdo from some serious gusts of wind you two gals number one checking your oil levels.

Is critically important since oil to your engine is basically like blood to your body so make sure to check it regularly and only on a cold engine you see if you locate the dipstick in an engine that was just actively working it won’t give you the most accurate results the bubbles that form from splashing on the way will prevent you from seeing how much oil you actually have in there.

And here’s a bonus replacing a missing wheel with a log okay this one sounds like it was taken straight out of a Russian fairy tale but it actually works and you can find pictures and videos proving it online imagine this you’re on a deserted Highway going through the woods see there’s Hansel and Gretel waving on the other side suddenly something is wrong with one of your rear wheels you can’t ask anyone for help and you’ve got to keep going as absurd as it might seem you can actually log your way home if you take a log and attach it to the bumper then stretch it under the body of the car and attach it to the rear axle it will work as a makeshift wheel or a sledge for your car this will only work on your rear wheels because they don’t turn.

And you’ll have to go slowly and carefully but it actually works.

And you can also use a log to get out of the mud tie it to the wheel using a rope tape or even your own shoelaces thread it through the hole in the wheel disk take it out on the other side of the wheel and tie it once again then do the same with the second wheel the trick will work as you start driving at a steady speed with no sudden acceleration or stops Wow so which of the tips do you want to try out first me.

I think I just want to keep the stinky people out of my car anyway let me know down in the comments if you learned something new today then give this video alike and share it with a frog but they don’t go anywhere just yet we have over 2,000 cool videos for you to check out all you have to do is pick the left or right video click on it and enjoy stay on the bright side of life.

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Home Theater Design Best Practices

Hi everyone i’m scott newnam ceo of audio advice we’ve designed and installed over a thousand theaters and this video is part of our home theater design series that covers virtually everything about designing a home theater in this video we’re going to be talking about laying out the physical space for your home theater we’ll discuss all the different aspects of laying out your room and how to handle the elements of your room that you can control and also those that you cannot control if you want more information on anything covered in this video be sure to click the link in the description.

That will take you to our full article on home theater layout on our site there you can also explore all of our articles and videos on virtually everything home theater related or even design your own home theater in our interactive home theater design tool now let’s get started we’re going to start by talking about general room dimensions and acoustics ask any recording engineer and they will tell you that the physical room dimensions have a huge impact on the sound you’ll be able to get in a room if you’re lucky enough to be designing your home theater from scratch there are some ratios you can use to get your room to a great basic shape the most famous is the golden ratio of 1 to 1.6 to 2.6 as an example a room with a 10-foot high ceiling would ideally be 16 feet wide and 26 feet long we won’t get too deep into this here but.

The dimensions are so important because the size and shape of every room causes some frequencies to be amplified and some to be almost completely cancelled out because of how sound waves bounce off the walls and interact in your room this causes some areas of the room to have overly boomy bass while other areas have severely lacked bass no room is perfect but getting close to the golden ratio and avoiding dimensions that are multiples of each other will ensure your room has fairly consistent bass in the main seating area also try to stay away from dimensions that are close to each.

Other the worst possible room would be a cube say 10 feet by 10 feet by 10 feet even the best sound system cannot overcome a really bad room if you’re building your room from scratch and are planning on multiple rows of seating remember to count for riser height when deciding ceiling height if you’re unsure about your dimensions and have the ability to adjust give us a call or chat with us at audioadvice.com and we’ll be glad to help on the audio advice website we have a fully interactive design tool where you can interactively adjust your room dimensions and different speaker setups and get the optimal placement and design while there are ideal positions for speakers oftentimes rooms don’t allow for placing speakers in the perfect positions at audio advice we carry plenty.

Of problem solver speakers that will ensure you still get great sound even in a less than ideal room take a look at our article and video on speaker layouts to get an idea of where they might need to be located before you start adding other elements if you have the luxury of designing your room from scratch this process is usually much more straightforward the big decision is deciding what speaker layout you want this could be a basic 5.1 setup or a full-blown 7.2.4 setup or even beyond this for more information on what these numbers mean check out our article and video on surround sound options or go to our interactive tool and play around with all.

The different options when you’re designing your home theater layout in general the screen wall will typically be the short wall obviously your seating layout will affect this especially in family rooms but at the very least try to get the screen centered on the seating area with your speakers an equal distance off to each side from the video display if you’re using a front projection system you also have the option of putting the front speakers behind the screen you will find that viewing a two hour movie or three hour game will be a lot more comfortable if the screen is at about eye level a point of reference is to target the bottom of your screen 30 to 36 inches off the floor when flat panel tvs came on the scene many people started mounting the tv above the fireplace mantel this setup isn’t ideal for the muscles in your neck.


So either mount it as low as you can or you can use manual or power tv mounting brackets that will move the tv down for viewing for tips on choosing the right screen size check out our article and video in the link that explains all of the factors to consider our interactive design tool also will show you what the various optimal screen sizes are for your specific room setup let’s move on to paint and lighting when designing your room you want to try to prevent light from windows from spilling onto your screen if you have windows consider using some sort of blackout curtain or shade heavy curtains often provide an acoustic benefit too if you think about the last time you were in a commercial theater you probably noticed there were no windows.

And the walls and ceiling were painted dark this is especially important for home theater rooms with a front projection screen most screens reflect light off at a pretty wide angle and you don’t want that light reflecting back off the walls dark gray is an ideal color but whatever you choose make sure you use a matte or flat paint finish when it comes to lighting you will want to consider task lighting accent lighting and safety lighting adding remote control to the lighting also adds a super cool wow factor to your home theater if you watch some of our installation videos.

Of theaters we have built you’ll see how we integrate different types of lighting again be sure to look in the description for our article that goes much more in depth on the do’s and don’ts of home theater lighting if you’re going for a real home theater experience with a large screen and multiple rows of seating you’ll need to think about sight lines sight lines are the angle and direction the screen is viewed from each seating position when you have more than one row of seating a riser is needed so the back row can see over the front row without being blocked in general you want at least an 8 inch high riser if you have the ceiling height you should go even higher a 12 or 16 inch platform is even better for the rear rows the depth of the riser should be a minimum of six feet to allow for people.

To pass in front of the footrest on a recline theater chair with a couch or other fixed type of seating you can sometimes get by with a five foot deep riser if you’re thinking about putting a multi-row home theater system into a living room or spare bedroom you can use prefabricated risers so you don’t have to do any permanent construction or if you have some carpentry skills you can make them yourself if you want that third row of seating in your theater but don’t quite have the ceiling height for it a cool option is building a bar behind the second row of seats the bar stools will get people.

In the third row up high enough to avoid any sight line issues while still being on the same riser as the second row plus you’ll have a great spot for the big spread you’ll put out for your watch parties hopefully this overview has given you some insight on some of the smaller details on home theater room layout that are sometimes overlooked when planning a home theater room this video is part of the audio advice home theater design series of videos that cover all aspects of designing a home theater.

In our description you will find links to all of the articles and videos as well as our really cool interactive home theater design tool if you have any questions or decide to like some help planning your theater or maybe you’d rather just have someone build it for you give us a call or chat with our team at audioadvice.com or if you’re near Raleigh or charlotte swing into our stores and we’d love to help you out thank you for watching if you enjoyed this video please give it a like and be sure to subscribe to our channel so you never miss the latest home audio and home theater content we’ll see you next time.

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How To Clear A Green Pool FAST

 

Is your pool water green. Well, the good news is you don’t have to drain your pool and start over to get rid of it. Here’s a quick guide on how to kill pool algae fast and keep it from coming back. Let’s dive in. Real quick, before we continue, if you want more help taking care of your pool, be sure to grab our free pool care cheat sheet at SwimUniversity.com/Cheat Sheet. It’s totally free and will help keep your pool clean and clear all season long. First, why do I have a green swimming pool? Well, the culprit for green water is pool algae. If it’s light green, the algae is likely just starting to take hold, but a deeper green means you have a bigger algae bloom problem.

Green algae happens when your chlorine levels are too low. When your chlorine levels are low, your chlorine can’t sanitize the water, and algae can start to develop.

Algae can also grow if your pool filter hasn’t been running properly and the water hasn’t been passing through your filtration system. If you’ve added chlorine and you’re running your filter and the algae just won’t go away, here’s how to fix green pool water fast. Make sure you follow every step in order to make sure you’re as efficient as possible.

One, brush the pool walls and floor. Attach a pool brush to a telescopic pole and scrub the pool walls, floor, steps, and any surface the algae might be clinging to.

The goal is to get the algae floating in suspension in your pool water, giving the chlorine a better chance to kill it. If you have a concrete pool, it’s best to use an algae brush. Algae is tough and will stubbornly cling to the pool surfaces, especially porous concrete so a heavy duty brush works better than soft nylon bristles in this case.

Two, test your alkalinity and pH. Using test strips or a liquid test kit, test the pH and alkalinity levels.

Your pH should be between 7.4 and 7.6.

It’s okay if it’s a bit lower since you’ll be adding shock later that actually raises the pH. Your total alkalinity should be between 100 and 150 parts per million. Again, it’s okay if this is a bit lower. If your pH and alkalinity are too high, now’s the time to adjust them. Start with lowering your alkalinity first, which should bring your pH down in range.

Then, retest your water. And if needed, adjust your pH afterward. Adjusting your pH and alkalinity at this stage will ensure the shock treatment will be as effective as possible.

Also, testing your water can happen before brushing. It won’t affect the algae killing process.

And if you need more help balancing your pH and alkalinity, be sure to check out our other video on pool water chemistry. Three, shock your pool with chlorine to kill algae. This is the most important step in clearing up a green pool because shock is what kills the algae. Pool shock contains a high level of chlorine that will kill algae and sanitize your pool water. For the best results, use a calcium hypochlorite shock AKA cal-hypo shock that contains at least 70% available chlorine.

If you usually use a non-chlorine shock, you must use a chlorine shock to kill algae. Non-chlorine shock just won’t work to get rid of algae spores. And keep in mind, it’s best to shock at night. Otherwise, the sun can burn off the shock and it will be less effective.

So how much shock do you need to kill the algae in your pool?

It depends on the color of the algae. A normal shock treatment is one pound of shock per 10,000 gallons of pool water. But that’s if your pool isn’t green. If your pool is a light green, you’ll need to add double the shock to your pool water. If your pool is dark green, you’ll need to add triple the amount.

And if your pool is black, you’ll need to quadruple shock your pool. For example, if you have a 20,000-gallon pool or about 7,500 liters and your water was dark green, you’ll need six bags of shock. That’s a triple dose. If you need more help about how to add shock to your pool water, be sure to check out our other video or run your pool filter for eight hours and shock again if needed.

As you let the shock work, run your filter system for at least eight hours overnight.

But if you can run the filter 24 hours a day until your pool is clear, this will help clear your water faster. If the pool is still green or teal in the morning, hit it again with the same amount of shock the following night. And by the next morning, it should be cloudy blue. In this case, cloudy water is actually a good thing. If your pool is cloudy blue, that means you’ve successfully killed all the algae and it’s floating in the water.

Keep your filter system running for at least 24 hours to get the dead algae out of the water and to ensure the shock has fully dissipated. If you winna speed up the process, you can use a pool clarifier to help clear the water more quickly. Or if you want a more powerful treatment to clear up the cloudy water, use a pool flocculant. Keep in mind that you’ll need to vacuum your pool after using this.

And it only works if you have a filter with a waste setting.

Five, clean your filter. Make sure you backwash your filter or change the cartridge after all the algae is gone. All that dead algae is caught in your filter medium so now it’s time to clean it. If you need more help on when and how to backwash your sand or DE filter, be sure to check out our other videos. Number six, test your water again and adjust your pool chemicals.

When your pool isn’t green anymore or you have cloudy blue or clear water, test your water again. This time, test for pH, alkalinity, calcium hardness, and your chlorine levels. And add chemicals as needed to balance things out. Once you made sure all your levels are where they need to be, you’re ready to enjoy your pool again.

So now that your pool is clear, how do you keep pool algae from coming back?

Well, the best way to keep algae away is keeping your chlorine levels in the right range. This means testing your water at least once a week or more often if you’re noticing fluctuations. If you noticed your levels are a bit on the low side, don’t wait for things to get worse. Add chlorine immediately. And if you have a salt water pool, make sure your salt water generator is keeping your chlorine levels consistent.

If you wanna take more preventative measures, you can also add algaecide during your regular pool maintenance.

But your best bet is to just stay on top of your chlorine levels. If you need more help with pool maintenance, grab our free pool care cheat sheet at SwimUniversity.com/CheatSheet. And if you found this video helpful, leave a comment, hit the like button, and subscribe for more pool maintenance tutorials throughout the season.

That’s it. Thanks again and happy swimming.

 

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All About Padlocks

 

In this video, we’re going to use 3D animation to show the inside of a combination lock. I’m going to go over exactly why putting in a three-digit combination allows us to open the lock. Let’s check it out. During most of my teen years, I used a combination lock at school to open up my locker. Before making this video, I really didn’t understand how it worked.

So, I did some research, looked at a few patents, and then opened one up to see what’s on the inside.

Let me show you what I learned. (bright music) Here’s the case that holds all of our parts. This metal curved bar is called the shackle. It won’t come out until the right combination is put in.

Then, it pops right open. This piece is called the lever. It slides right onto the bar here. The lever can rotate counterclockwise. This piece of metal wants to flex outward.

Once it’s bent inside of here, the tension makes the latch want to spring back to its original position. Normally, the latch would just keep going, but the rotation will be stopped by this tiny bump. The lever also has a tiny latch here that is spring loaded from the inside. The shackle comes down, pushes the latch in, and then the latch fits right into the groove, and we are locked. When the shackle is pulled out, the latch is forced to rotate to allow the shackle to come all the way out.

Then, the lever springs back into place. Let’s watch that again. The shackle can’t come all the way out because of the shackle collar. It guides the shackle as it slides along here. But it stops us once we hit the very top.

Okay, the reason that the locking mechanism works is that, if the latch can’t rotate, then the shackle won’t come out. This is where the three cams come into play. Let me show you. The back place has a bar sticking out.

It holds the three cams, washers in between, and a spring at the end.

The spring ensures that the three cams and the washers are all pressed together. Cams two and three can spin freely. But cam number one is actually attached to the dial. So, when the dial spins, this cam spins too. This is what it looks like al put together.

Each cam has an indentation in them. The lock will open when all three of them are lined up. You can see how the lever can now rotate, which allows the shackle to open. When these three indentations are not lined up, the lever can’t rotate, which means the shackle can’t come out. So how do we line up the cams by only turning this dial?

Let’s look a little closer.

Each cam has at least one of these teeth sticking off of it. You can see them better from this point of view. If we turn came one far enough, the tooth on cam one will contact the tooth on cam two. And then if we keep turning, all three cams move together.

In fact, this is the first step to opening up the lock. Let’s walk through this process on the inside. This time we’re looking at it from the front, so all three cams will need to line up here.

We turn the dial clockwise three times to clear it. All three cam teeth are in contact with each other and move as one.

Now let’s keep turning the dial until we hit the first number in the combination, which in this case is 21. Notice how cam three is now lined up right where it should be. Now let’s work on the second number in the combination. This time we turn counterclockwise one full rotation. Watch as the teeth from cam one comes in contact with came two on the other side.

Notice how this doesn’t touch cam three, which is still right where it should be.

Now we keep spinning the dial until we hit the second number, which is 34. Now cam two and cam three are lined up. For the last number in the combination, just rotate the dial clockwise until it lines up with the third number. And there we go.

All three cams are lined up, the lever rotates, allowing the shackle to come out. As the shackle is pushed back in, it comes down with a bit of a jolt, which is usually enough to nudge the cams out of alignment. This means the lock won’t open a second time for free; you’ll need to use the correct combination once again.

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