Koj puas paub tias txhua tus nyiam dhia dhia dhau ib txhiab xyoo? Ntau haiv neeg siv pob rau kev ua yeeb yam thiab, tau kawg, rau kev ua si. Tab sis cov roj hmab "dhia" tau dhau los ua neeg nyiam heev. Thiab Christopher Columbus tau qhib nws mus rau lub ntiaj teb, coj nws los ntawm tseem tsis tau paub txog Asmeskas. Txog tam sim no, elastic bun tseem yog ib qho khoom ua si nyiam rau menyuam yaus thiab cov neeg laus. Koj puas xav ua rau koj cov menyuam xav tsis thoob thiab muab lawv tsis yog lub pob bouncing xwb, tab sis kuj tseem nco txog lub sijhawm zoo siab ntawm kev sib koom ua ke? Tsis paub yuav ua li cas? Ua ib lub jumper hauv tsev! Koj yuav xav tsis thoob tias nws yooj yim npaum li cas.
Spike "Elementarus"
Txhua yam koj xav tau yog ethyl cawv thiab silicate kua nplaum. Nws yog los ntawm ob lub ntsiab lus uas lub jumper yuav muaj. Nws tseem tsuas yog coj lub khob yas rau hauv uas koj yuav tsum tau ncuav cov khoom xyaw, thiab ib daim nplaum nplaum. Yog li peb tuaj rau lo lus teb rau lo lus nug: "Yuav ua li cas ua ib lub jumper hauv tsev?".
Thaum tag nrho cov khoom no nyob ntawm tes, sib tov kua nplaum nrog cawv hauv qhov sib piv 4: 1. Sib tovlawv yuav tsum tau kom txog rau thaum lub loj pib thicken, ntau npaum li ntawd nws yuav nyuaj rau txav nws. Siv cov roj hmab sib xyaw, yaug hauv qab dej ntws thiab ua kom zoo li lub pob.
Nws yog lub sijhawm los pib sim lub peev xwm dhia. Ntaus pob rau ntawm qhov tawv tawv thiab ntes nws rov qab!
Tsis txhob tso tseg
Thaum koj paub yuav ua li cas thiaj ua tau lub pob bouncing hauv tsev, koj tuaj yeem hloov daim ntawv qhia pob bouncing raws li koj nyiam. Koj yuav nkag siab tias cov tshuaj muaj pes tsawg leeg cuam tshuam li cas rau kev dhia dhia, kev ntxhib los mos, xim thiab lwm yam khoom ntawm cov khoom. Leej twg paub, tej zaum koj yuav ntxiv qee cov khoom xyaw rau cov khoom ua si elastic, thiab koj yuav tau txais cov khoom ua si tshwj xeeb uas txawm tias tau txais patent! Nov yog ib qho piv txwv nthuav txog kev ua pob.
Experimentarus Jumper
Yuav ua li cas koj yuav xav tau:
- borax;
- qos yaj ywm los yog pob kws hmoov nplej;
- kua nplaum (yog tias koj noj silicate, nws yuav muab pob pob tshab);
- dej sov;
- luminescent dye (koj tuaj yeem siv cov xim yog tias koj xav tau).
Thiab:
- diav;
- ob lub khob yas lossis lwm lub thawv rau kev sib xyaw ua ke.
Kauj Ruam 1
Ncuav 2 tablespoons dej sov rau hauv ib khob thiab ntxiv ib nrab ib diav ntawm borax rau nws, do kom txog thaum cov hmoov yaj tag. Nyob rau tib theem, ntxiv dye, yog tias koj xav ua kom lub pob xim.
Kauj Ruam 2
Rau hauv khob thib obncuav nyob rau hauv ib spoonful ntawm kua nplaum thiab ib nrab ib diav ntawm cov twb npaj sib tov. Sprinkle ib spoonful ntawm starch.
Ib qho tseem ceeb: tsis txhob do! Cia cov khoom xyaw sib cuam tshuam ntawm lawv tus kheej li 10-15 vib nas this, thiab tsuas yog tom qab ntawd pab cov tshuaj tiv thaiv kev sib raug zoo los ntawm kev sib xyaw ua ke.
Thaum qhov sib xyaw ua kom tawv txaus kom txav tau yooj yim, tshem cov khoom ntawm lub khob thiab pib ua lub pob nrog koj txhais tes.
Thaum xub thawj, qhov loj yuav nplaum thiab pleev xim rau koj ob txhais tes (yog tias koj muab cov hnab looj tes roj hmab, koj yuav tsis qias neeg), tab sis cov nyhuv no yuav ploj mus thaum nws tawv. Thaum qhov no tshwm sim, lub jumper npaj txhij!
Feem ntau, koj paub yuav ua li cas ua ib lub jumper hauv tsev. Tab sis tsis yog tag nrho!
Focus
Yuav qee cov khoom sib txawv. Muab faib ua ob peb ntu. Nqa cov khoom los ntawm cov balloons sib txawv thiab muab tso rau hauv ib lub pob. Koj yuav tau txais "Bouncer" zoo heev uas yuav tsis tso leej twg tsis quav ntsej!
Nws ua haujlwm li cas?
- Cov nplaum muaj cov polymer polyvinyl acetate (PVA), uas nyiam txhua yam rau nws tus kheej, cuam tshuam nrog borax.
- Cov hmoov txhuv nplej siab muaj amylopectin thiab muab cov khoom ua si elasticity, pab ntxiv dag zog rau kev sib txuas ntawm cov molecules, tib lub sij hawm muab cov khoom saum npoo zoo nkauj thiab elasticity. Tib lub sijhawm, lub pob khaws nws cov duab zoo dua li tsis muaj hmoov txhuv nplej siab.
- Borax kuj pab hauv cov khoom sib txuas thiab lub zog.
Lwm txoj kev xaiv
Koj puas txaus siab rau lwm txoj hauv kev los ua tus jumper? Los ntawm plasticine, ntawv, qe, ntawv sau roj hmab band thiab … Tab sis qhov no yuav tham txog lwm nplooj ntawv.
