A.图1:同一艘轮船在不同海域航行时所受的浮力大小不同 |
B.图2:安全锤做得很尖是为了减小受力面积,从而减小压强 |
C.图3:自制气压计从山脚拿到山顶,玻璃管中液柱随外界气压减小而升高 |
D.图4:向盛有刚沸腾的水的烧瓶底浇冷水,增大水面上方的气压从而降低水的沸点 |
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2