圆底烧瓶瓶底面积为30cm²,内装有500ml水,

N = G = mg = 5 N
s = 30 cm² = 0.0030 m²
p = N/s
= 5 / 0.0030
= 5000 / 3
≈ 1667 Pa���ܵ�ѹ����Ӧ����3n��1000*10*0.1*0.003����ˡ� ��Ӧ��֪����500 ml ˮ��Լ5N �� 4.9N�� N = G = mg = 4.9 Ns = 30 cm² = 0.0030 m²p = N/s = 4.9 / 0.0030 �� 1633 Pa 1633Pa�� 1667Pa �� �㿴���ĸ���һЩ���ɲο��α�Ҫ��ѡ��һ���𰸡�但是f=密度*g*h=1000*10*0.1*0.003=3n（g取10kg/n）这是公式~不要死记硬背。