of course, we say they're never giving up every weekend on d. w the out of the 225 windows if the nobel prize in physics just fine. so women, in fact women are under represented generally in the subject in western countries in particular that we're following few of female physics students and 3 such as the male. how do you get goals interested in physics? perhaps with an exciting experiment. welcome to dw science shape the . the object that's crushing down here comes directly from the stratosphere. it's

the result of months of preparation by students at this old goals high school in southern gemini, a few hours earlier. the final preparations are on the way. so the experiments, it's a joint project between the school and cosmo is university of education. the aim is to launch a high altitude weather balloon with a measuring crew into the stratosphere. everything is being planned and built here and includes some age appropriate props. as we've started the chocolate marshmallow on that with super glue so that we can see how much it expands in the. yeah, the emphasis on practical work makes the learning relaxed, almost effortless enough later on in his own a weather balloon. probe a power shoot. it's really swelling, so i'm very excited now. tense, i toss fund. i found it really exciting the topic. i'm what's it looks like up that i'm what will happen to the times when they're out there hasn't been to say,

i've always been interested in once. it looks like up that what the us looks like from above and yet assess it kind of fascinated me. i think going to move this kind of top. everything's assembled full measuring devices around board, the gps track of working time for a final check for insurance reasons, the pro mist way, no more than 2 kilos. the experiment has a further purpose beyond the obvious how to get goals interested in physics and how to make teacher training and science subjects. interesting. and with more practical experiences on my list, command piece response of what we've learned most is how much fun it can be authentic. i'm the gums marginally divided in a really curious way. what's interesting to us. yeah. and then approach the physics that we need for that zip demand to the doctor. but i'll come back and kind of we're not doing what keeps science, we're doing an educational project. and at the same time we're learning about the composition of all right,

ms. vega and perhaps also how unique this planet is that we're living on right now . and then regarding the university students have helped supervise the people's assault and the physics is so relevant to everyday life out of time. also in situations which you don't yet know. well, perhaps don't even think about being spot in the, in the exciting thing about physics is that many people don't realize that it surrounds us. it but to meet every moment at the loan. she, it's clear that this is all about physics. the, the pressure is on 5000 liters of helium. and the whole school watched countdown time the balloon rises rapidly. soon it's no longer visible. and then people's students, teachers, parents,

the chase is on the atlantic directors that came about the symptoms. then the gps transmitted temporarily fails. when is the pro last time in the balloon is full cost to land in a nearby town with this noise. that's all the blueness mandate up that there in the tree at the top left the lead. did it guys the victorious ending was about the house, the most my uh, that is next have been small. the highlights, analyzing the camera footage the,

the that, that's also cool. really cold desktop the radiation measuring device has had enough because too much radiation. mm hm. that's what was be paying now. yes, it reached its daily maximum doves on the desk. i find that in physics you just discover things that i don't think you really teach it. you experience it yourself, and that's what i think we did today. on the i'd say we achieve what we wanted to achieve as to the pollutant maintenance stuff. a few weeks later, a debrief, obtained altitude surgery, 4602 mates has a 2 and a half hour journey into the stratosphere and the high speed return when and missile some of the measurements what?

well, others less. so that's just how it says in physics. we're still working to save a couple of the data set just in today. we evaluated what we already have. they're going to ask about the assignments when we were a great, great and had fun. we were interested in the solve the tasks we were given really well set time with good news, which just shows that education can be simple when it's fun. face trouble is another male dominated environment. to date, just 12 percent of our students have been women. and yet to study by the european space agency reveals that women of fall back to see to, to space travels a man they have more efficient metabolisms and consume fewer resources including space schools and mental health v e from mexico has sent us an interesting question about that topic how is it possible for astra notes to do

space books are working outside the station or the cold in space is by difficult and dangerous. it's extremely cold where the i ss old bits and there's no human beings would perish off to just 30 seconds out. that astronauts can only survive in space wearing special seats, which are effectively like small spaceships. a rucksack, supplies them with add to breeze and also removes exiled carbon dioxide. the seats have several layers that need to be gas tight and with the stand excess pressure. the outlet is made of fire retardant. catalog coated with a menu of the suits protect against the vacuum as the cold, as well as mike cray, meteor writes, and solar radiation special underway with tubes through which cool water flies prevents the aspirin notes from overheating, showing the strenuous look as to trains of space missions in special swimming pools

like type is that more than $100.00 killer heavy suits substituted with weights, which allow them to select corresponding to the conditions in the international space station is a waiting list environments. this is because it little bits the so fast that centrifugal force of gravity balance each other around. it travels 7 kilometers per 2nd, the, the asteroid, some losing at the same speed. but they didn't notice it. physically speaking, outside the station there in their own little bit, even a tiny push movement can alter this old bitch and caused them to drift away. that the up guess that i still have already lost

they wouldn't be able to return in that room. that's why the extra notes that tended to the spacecraft at full cummings in 1984 no said tested special get backpacks. these would develop submissions where astronauts have to move far away from the spaceship. for example, to capture stuff to lights, the in an emergency astronauts could ignite this thrust as to stabilize that position and then return to the ship the during extra the hit killer activities on the i assess astronauts as a kid with 2 texas. these lines of attached to poles and candles, which the astronaut seems to move around, around when they change position, at least $110.00 miss ways be attached to long distance is the ask, you know, so this impulse on the right bus take um to the deployment science special

platforms for that fee to help them securely insights. we low phones are in your questions, do you have one it so you send it to us as a video, text or voice message. and if we don't switch on the show, it will send you a little surprised as a funky to come on. just ask when it comes to choosing an apprenticeship in germany, goes to pick it up to train is assistance and the business or medical sexes. boys tend more towards mca tronics will become electricians. career choices are still very much shaped by stereotypes, but it doesn't have to be the way a step and prefers action instead of tools and doesn't want to go to university right now. she belongs to the generation campaigning for climate protection, but that's not passing. she wants to learn practical skills to protect the climate

thing. first of all, provide drinking water treatment for the softening systems, not so positive our job. and so we might even have a drinking or to shortage in the future. so how can we use rainwater? we learn all that's at school. i'm practically to on the construction site. there's quite a few and there's definitely something to be gained from taking to the streets. i'm all for that, but i'm the kind of person who prefers to create solutions with my other times shop . first of us today, the 18 year old is switching ventilation pipes. so far her favorite aspect to the what because being in customer service, she enjoys educating people, advising them on climate friendly technologies. this is mine, i'm training to be a fun mechanics assignment tree heating and air conditioning. that's the full name on her instruct to boost and you see shows us the main heating way. it's about with the latest technology that spring came over to storage. right? no, that's the buffer time kits. different. yeah. a foot plan to go talk grades at high

school, finished and fall off. she's chosen this male dominated profession because she wants to make a difference. ready so i'm on to, to even do something for the local environment and that is really the guy. that's the right attitude to the right. if you can do something yourself on the sites, don't expect others to do it for, you know, the tech is always developing and this is the next generation. so it's very important. it's that. so this is every stage. her commitment to the climate has grown in the 11th grade, she wrote the physics paper on the side table tax and fell in love with renewable images. she's being fascinated by the subject of a sense, spending session in those 4 would be that right now. construction site, since those being supplied only with heat generated from the ground to how does a young person it's so amazing to see that you can get heat energy from sources other than fossil fuels to come to. but it makes you really have pictures of the

one part, the stuff about parents that makes a proud of that door to end the path she's chosen well, the is to be less supportive with their butts friendship. a select my, maybe i'll become a mazda trades past and spoke to a degree of friends gets it. i'm gonna find the most of my friends of studying, but they're actually quite positive about it too. they usually say, okay, i wouldn't want to do the job myself, but we do need people who do thoughtlessness has brought this well to the point where we have no option but to can. now, if i've done to is chosen a profession to which she can make the world best to place the ventilation systems like those the 8th of planned works on becoming increasingly important. the career in a virus comes out make, make many of us aware of just what can collect to not endure and keeping in those

spaces wells and selected is still vital. an uh, quality measurement campaign as an elementary school in switzerland is a way to go. you know, into team from the school of engineering and architecture in sleep. what are in storing senses for potentially hazardous activity space inside and outside the data collected from around 25 switched schools shows a clear problem with the quality of the this is the case in many buildings where people spend time together which will be in sick. we now know that the variety of pollutants is found in indo ag and have a significant effect on our house. the ones that pollutants has already clearly demonstrated

this corona virus. it wasn't so long ago that students were sitting in school classrooms with the tools and windows and several studies show that there are found few infections in well ventilated rooms that include events, and they could one's pandemic put equity firmly on the agenda. i'll send you definitely do that, can you send to them into at quality was suddenly a token point student again. unfortunately, since then, people have phone and back into old habits and the lessons learned from cove it. and now having little effect, wonder if it was all the ventilation behavior is now knowledge the back to us. it was before the pandemic, and yet people typically spend 80 to 90 percent of their lives in those schools can house a high level of pollutants in addition to viruses? c o 2 often accumulates and then, and then with fine dust mode, schools, and different chemicals in many parts of the world, radon is often also present or radioactive gas submitted from the at the resulting

mix. you can be bad for our house, invisible and potentially responsible for diseases such as asthma and cancer in the long term to let it go yet know, sees an urgent need for action. in 2023, the arrow biologist attended the w. h chose 1st indoor at quality conference in them, switzerland. it same was to raise awareness and bring decision makers and massages together. that message was clear. visualize in the visa make in durham are visible. when i go to the ball, it was to me all into twain buttons, public transportation. i need to know if it was safe or not. so i need to see that visible at the conference. the indoor at quality was also a message encouraging room temperature, humidity, and c o 2 levels of i'm not toxic, can high concentrations,

c o 2 can impact wellbeing, and the gas is also in indicate of, of pathogens. if it exceeds a certain amount, an infection becomes more likely as yet there were no binding limit values for c o 2 or other pollutants. so that the w h o is developing recommendations. and then decision makers, either at country or international and then those are using that to set standards in my series to confirm that the responsibility of the state of decision makers to said regulation sydney loudly as we have a right to clean water. we also have a right to breeds clean and we might not, and we should not compromise on that. that's right. and kind of the centrally pure

thought, i'd like to mention every building, even every we should be equipped with systems that accurately measure toxic pollutants as well as c o 2 and which ideally automatically exchange yeah. for example, via and mechanical ventilation systems. these need to be properly adjusted, but that's not always the case because the study for free. what reveals to all that good out of 11 schools studied almost all ventilation system that have very different values, even though they have the same purpose. namely, to ventilate classrooms of similar sizes with similar numbers of students in the fall semester. on top of this, even well maintained ventilation systems make the very dry, especially in winter, an ideal environment for virus that sees what over how's your sticks? you have to find the right balance between ventilation and moisture recovery to limits. infections, especially viral infections,

fit the fixture and the motion. and if you have windows that can be opened, it's a good idea to add rooms regularly and extensively the exhibits and museums that typically protected from environmental damage by being kept in display cases. but the air within these can itself pays of risk. now research has a testing out a surprisingly simple solution. the festa colberg fortress complex in bavaria boasts of valuable glass collection, including unique's red glosses from the renee songs and precious bloss where from the 16th century the collections conservatives have done everything they can to preserve these treasures, which it's most enough display of drinking glass contains fine mike cracks is this

clause, is this cost is about a 150 years old and it's being damaged by formaldehyde. this is, this is one of the main guesses that we have to content within the museum. was this damages caused by the depletion of substances. that had dissolved out of the gloss resulting in these micro credit. just curious to know some flaws and others. interesting because i said what's challenging is that the home full substances are in the arrows. the display cases, they come from a t sips, for example, or textile coverage. now, scientists from zone on to university of come up with a simple way of killing the pollutants by using salt solutions. these are made up of water and various thoughts, like potassium carbonate or potash tons of stuff, because i think this as will depend on this. the salt solution, such as potassium carbonate to be placed discrete in display case in the should then absorb pollutants. so for a long period and protect the exhibits

a c take gnostic gas is a pollutant that can damage museum exhibits. or if i believe uh to his colleague want to show how potassium carbonates can render. this homeless, the tube of photos rent present the meaning of showcase is the one on the right to contains the potassium carbonate salt solution. the one on the left contains v as as soon as the a c take, nasa gas is injected. the gas concentration in the patrol rises right in the bottle with the salt solution. flew in the bottle containing time. then it's time to wait a few minutes. let's see, just sick. i'm sure you can see quite nicely here that within 2 minutes the potassium carbonate has taken most of the a c take acetate out of the demo victory here in the example below, you can see that the casting is still in. yeah, leaving it to damage the exhibits. so how does it work? the polluting gas flows into the mini between the attractive forces and the water

molecules drew a large number of a c to acid molecules into the salt solution. the potassium carbonate mendez, many of them homeless through a chemical reaction. this leave space in the salt solution for more as a home to gas, which continues to be attracted to some of the a, c. take acid molecules escape and turn into gas again. but then the drawing backend over time the process comes down, then almost all of the home for gas is developed and the liquid and no longer poses a risk. the next step is to place the solar solutions in display cases that are over 60 needs in the festa. co book is one of those museums, keen to put the salt solutions to the test. the museum is a special case for the past 2 years. it's been using a salt solution, will be it magnesium, co ride, that smells effective against pollutants such as

a c to caps. they don't, formaldehyde no has not been massaged, but it is against damage caused by moisture in the display case at 1st. okay. how do you fish moist it has the ability to draw all components out of the glass. if you don't do anything about it over time, the cracks will run through the entire loss and can cause it to for the pot to end of class, we'll send a method to avoid this. the humidity and the display cases must stay at a fixed level. something the magnesium fluoride previously insured, is very human death flows into the display case and some of it reaches the magnesium fluoride salt solutions through the cracks. a large number of water molecules have absorbed from the yeah into the salt solution. the add becomes dryer until this a constant humidity of 33 percent. if the air is very dry, winter moisture levels drop in the case,

then many water molecules evaporate until the humidity with tons to 33 percent. a simple and effective regulation system. now i have a flush, a lot of things. however, recent research has shown that 33 percent is actually false, too low, especially for unstable and sick class to. so we looked for other salts that could keep humidity at around 43 percent, and found potassium carbonate could do that. it's much better to sit gloves fewer best so. so potassium carbonate solution can rent a damaging gas as homeless and also insure constant humidity. this is important for many exhibits. the salt solution is also easy and inexpensive to produce, making it perfect for small museums with limited resources. heineken eve is now replacing the museums, magnesium, fluoride solutions, with new ones made from potassium carbonate. he's came to from down. what does the

optimum humidity level in the display case? really remain stable at the moment? humidity is that 69 percent. 2 sides is, is it's over the next 6 weeks, the potassium carbonate should reduce the relative humidity to 43 percent connected to $4.00, to $6.00. weeks later, the humidity in the showcase. uh is it a constant? 42 percent with us and that's a super result. the way more than happy with it doesn't get any, but has a nice to ensure that the display case trisha is preserved as well as possible. 38 museums in germany and 24 across europe. i'm the us and now testing the sold solutions, the sunset from us this time on dw science. i. thanks for joining us and see you again soon on tomorrow today. state

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