Science
Junior High
ใกใขใจใใใฃใฑใใงใใใใชใใ๏ผ(m2 ใฏๅนณๆนใกใผใใซใ่กจใใฆใพใ๏ผ
ไธญ1็็งใฎๅงๅใฎ่จ็ฎใซใคใใฆใงใใ
2็ชใฎ็ญใใฏ4500N/m2 ใงใ้ไธญๅผใฏ45Nรท0.01m2 ใชใฎใงใใใ
0.01ใใฉใใใๅบใฆใใฆใชใๅฒใใฎใใจใใใชใใใใใใใใใใชใใชใฃใฆใใพใฃใฆ๐ฆ
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