下列敘述何者錯誤海水密度不變a單位面積所受的垂直作用面的力稱為壓力b壓力的單位可以為kg/m2 c一大氣壓為76公分水銀柱d愈大的塑膠吸盤吸住時要將它們

�u���O�v�O�b�\�h��줤���|�Ψ쪺���z�q�A�ҥH�������Ʀh�ܤơA�`�`�|�ް_�x�b�C

1. ���O���w�q�G��쭱�n�Ҩ������V�@�ΤO�A�Y $P\, =\, \frac{F}{A}\,�C��M�u���O�v�ä��O�u�O (force)�v�F�ӬO�����u���O�j�סv���q�סC

����i�H���ܬ��G
N/m2�A�o�O SI ����Fnt/m2�A�o�O�H�e�Ϊ� MKS ��Fdyne/cm2�A�o�O CGS ��]�O�����ϥΪ��O������^
kgw/m2�A�o�O MKS ����Fgw/cm2�A�o�O CGS ��Flb/in2�A�o�O FPS ��]�O�����ϥΪ��O���O���^

bar (��) = 106 dyne/cm2�Bmb (�@��) = 103 dyne/cm2�A�o�O�H�e��H�ǤW�ϥΪ����C
barye = 1 dyne/cm2�A���֨ϥΡC
Pa = pascal (��) = 1 N/m2�AhPa (�ʩ�) = 102 N/m2  (hPa = mb)�A�o�O�{�b��H�ǤW�ϥΪ����C

psi = lb/in2�A�`�`�Φb�u�~�ɡC

2. �R��y�骺���O�� $P\, =\, hd\,�A�ϥΩ󭫤O���F$P\, =\, hdg\,�A�ϥΩ󵴹���C

����i�H���ܬ��G

cm-Hg�Fmm-Hg�Finch-Hg
�Ҧp�Ѧ������Q����i�H���o�зǪ��p�ɪ��j�����O�� 1 �j�����G
1 atm (atmosphere) = 76 cm-Hg = 760 mm-Hg�A�Y���⦨���h�� 10.336 m-H2O�C

torr (����) = mm-Hg�A�ϥΩ�u�~�ɡC

3. ��촫��G

1 atm = 76 cm-Hg = 760 mm-Hg = 760 torr
�@�@ = 29.9 in-Hg
�@�@ = 10.336 m-H2O
�@�@ = 1033.6 gw/cm2 = 1.0336 kgw/cm2 = 1.0336 �� 104 kgw/m2 = 14.7 lb/in2 = 14.7 psi
�@�@ = 1.013 �� 106 dyne/cm2 = 1.013 bar = 1013 mb
�@�@ = 1.013 �� 105 N/m2 = 1.013 �� 105 Pa = 1013 hPa


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