(1)若浮标有2×10 -4 m3的体积浸入油中,则油对它的浮力是多大?(g取10N/kg)
(2)当油面处在A处时,电流表示数为多少?
(3)已知电流增大时,电流表指针向右偏转,则 。
A.油面下降时,电流表指针向右偏转 |
B.油量表零刻度线一定与电流表原零刻度线相重合 |
C.油量表的刻度值从左往右是逐渐增大的 |
D.油箱内的油越少,流过电流表的电流越大 |
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