página 740

 
       
 


 

      

                                             Ekspanshon
                                  

                                               

                           Ora un material keinta e ta ékspandé.
                           Ora un material fria e ta krem.

                           Ora no tene kuenta ku ekspanshon por tin efekto malu pa konstukshon.
                           Bo no por stňp un material di e
ekspandé ora e keinta, dus bo mester dun'é espasio pa e rčk.
                           Un obheto su masa no ta kambia ora di keinta ňf fria, e densidat si ta kambia.

                          

                                                                                               
                            Sin espasio reil ta doblá ora e keintá. Pa e no dobla                                                       Julianabrug ta krem anochi. (djis algun cm)
                            e mester di poko espasio entre kada pida reil.

 


Na dos banda di brug Juliana.

 

                                

         Un pipa largu mester por ékspandé.

 

 

                                                         
                                   
                                         
                              Mayoria biaha ekspanshon di un obheto no ta visibel.
                              Tin eksperimento pa mustra ekspanshon, manera bala i renchi di'S Gravesande, mira video:

          







                              Mas un material keinta, mas e ta rčk.
                              E diferensha den largura nos ta yama Δl.      E símbolo Δ (délta) nifiká diferensha
.


                                      tambe:             ΔT = diferensha den temperatura.
                                                             Δt = diferensha den tempu.
                                                             ΔA = diferensha den superfisi.
                                                             ΔV = diferensha den kontenido/volumen.


                             éhčmpel 1: (Pa bo komprondé nifikashon di Δl i Δt. Aki e persona a krese despues tempu, kier men áki no ta papia di ékspanshon.)

                             Un mucha di 6 ańa ta midi 1 m. E mesun hende a krese.
                             Ora e tin 24 ańa e ta midi 1.9 m.

                                                                                   


                             1a      Kalkulá Δt.                24 ańa - 6 ańa = 18 ańa      Δt = 18 ańa

                             b       Kalkulá Δl.                1.9 m - 1 m = 0.9 m              Δl = 0.9 m


                           


                             éhčmpel 2:

                             Un waya ta midi 3,022 m, su temperatura ta 28°C.     Ora e keinta e ta bira 411°C i 3,028 m largu.

 

                                                                      
                                                                                            E ekspanshon pinta aki riba ta poko eksagerá.




                            2a      Kalkulá ΔT.                411 °C - 28 °C = 383 °C                     ΔT = 383 °C

                             b       Kalkulá Δl.                3,028 m - 3,022 m = 0.006 m              Δl = 0.006 m   (6 mm)

 


                             éhčmpel 3:

                              Dak di kas ta ékspandé den solo.
                             Tur dos banda di dak ta meskos.
                                     
                                     
                                                                  
                                            A =  l x b                                                                Ora e dak keinta e ta ékspandé.
                                            A = 10 m x 3 m                                                        (pasa ku e pointer riba e pintura pa bo mira)
                                            A = 30 m2

                 Pa tur dos banda:  A = 2 x 30 m2
                                            A = 60 m2                                                                ΔA = 30,6 m2 - 30m2
                                                                                                                           ΔA = 0,6 m2

                                                                                              Di tur dos banda:   2 x 0,6 m2 = 1,2 m2

 

                            4        Mira e hčmber ku awa promé i despues.                                                         
                                                                                                                                                         promé                        despues
                            a         E ŕwa a fria ňf keinta?
                            b         Kiko a pasa ku e masa (kg) di e awa?
                            c         Kua di e siguiente opshon por ta korekto?   E volumen di e awa despues ta .......

                                                            A  8,05 liter
                                                            B   8,1  liter
                                                            C   8,15 liter

 


 
                            5         Un waya di koper ta 13,88 m ora e midi 1032 °C.
                                       E waya ta bira 66 °C.
                                       Δl = 0.04 m

                            a         Karkulá ΔT.
                            b         E waya e ekspandé ňf krem?
                            c         Karkulá e largura di e waya na final.