Cov txheej txheem:
Video: Puas yog lub khob ntim ntim muaj tseeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Volumetric Glassware
Kawm tiav cylinders, beakers, volumetric pipets, burets thiab volumetric khob yog tsib yam iav feem ntau siv los ntsuas qhov ntim tshwj xeeb. Volumetric cov kav dej, khob khob thiab burets yog feem ntau raug ; tus iav makers calibrate cov no mus rau theem siab raug.
Yog li ntawd, vim li cas lub hwj chim volumetric yog qhov tseeb tshaj plaws?
Lub tog raj kheej yog tsim los kom muaj ib qho kom raug paub ntim, tab sis feem ntau yog siv los dispense ntawd ntim. Yog li ntawd, lawv tsis li raug as a volumetricflasks , tab sis qhov tseeb tias lawv kawm tiav ua rau lawv ntau ntau yam tshaj li volumetric khob.
Ib yam li ntawd, muaj pes tsawg sig figs puas muaj lub khob ntim ntim? ob sig fig
Ib yam li ntawd, nws raug nug, vim li cas lub khob ntim ntim muaj?
A volumetric hwj yog ib daim ntawm chav kuaj iav uas yog siv los npaj thiab ntsuas chemicalsolutions. Nws yog siv los ua ib qho kev daws teeb meem rau lub ntim paub. Volumetric khob ntsuas volumes ntau precisely tshaj beakers thiab Erlenmeyer khob.
Koj puas tuaj yeem ua kom sov lub khob ntim?
Cua sov iav los yog siv cua sov kev daws teeb meem distors lub ntim calibrated! Volumetric ("vol") ntim khoom kim heev thiab yuav tsum tau saib xyuas.
Pom zoo:
Qhov formula ntawm ntim ntawm lub khob hliav qab yog dab tsi?
Tab sis, txwv tsis pub cov mis yog tib yam. Yog li, qhov ntim ntawm txhua hom cone yog: V = ? A∙h qhov twg A yog thaj tsam ntawm lub hauv paus thiab h yog qhov siab raws li tau piav qhia saum toj no. Txawm li cas los xij, qee qhov ntawm lwm qhov kev ntsuas koj tuaj yeem kawm txog cov cones tshwj xeeb rau txoj cai cones
Puas yog ib qho khoom muaj qhov tseeb thiab ntim?
Txhua qhov teeb meem uas yog ib qho khoom muaj qhov tseeb zoo thiab qhov ntim meej. Cov molecules nyob rau hauv ib qho khoom yog nyob rau hauv taag txoj hauj lwm thiab nyob ze ua ke. Txawm hais tias cov molecules tseem tuaj yeem vibrate, lawv tsis tuaj yeem txav ntawm ib feem ntawm cov khoom mus rau lwm qhov. Yog li ntawd, ib qho khoom tsis yooj yim hloov nws cov duab lossis nws ntim
Puas muaj tseeb tias txhua txoj kab uas hla ntawm lub voj voog yog ib nrab ntawm nws lub vojvoog?
Tsis yog, txoj kab uas hla ntawm lub voj voog yog ob npaug ntawm nws lub vojvoog
Yuav ua li cas koj pom qhov siab ntawm lub khob hliav qab nrog lub ntim?
Square lub vojvoog, thiab mam li faib lub vojvoog squaredin mus rau lub ntim tripled. Piv txwv li no, lub vojvoog yog 2.Lub square ntawm 2 yog 4, thiab 300 muab faib los ntawm 4 yog 75. Faib tus nqi xam nyob rau hauv Kauj ruam 2 los ntawm pi, uas yog ib tug unending lej tas li uas pib 3.14, xam lub khob hliav qab qhov siab
Yuav ua li cas koj pom qhov ntim ntawm lub khob hliav qab hauv lub tog raj kheej?
Cov mis rau qhov ntim ntawm lub tog raj kheej yog v = πr2h. Qhov ntim rau lub khob hliav qab uas nws lub vojvoog yog R thiab qhov siab yog H yog V = 1/3π R2H