railway RRB Group D Mock Test Series 2024-25 Physics Fluids Surface tension

પૃષ્ઠતાણનો એકમ શું છે?

1
ન્યૂટન/મીટર
2
જૂલ/મીટર2
3
1 અને 2 બંને 
4
1 કે 2 માંથી એક પણ નહીં 
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