(1)该实验还可以利用
(2)在一根金属条的A、B、C、D处分别用蜡固定四根火柴,然后用酒精灯给金属条加热。火柴掉落的顺序是
(3)酒精灯加热时,蜡受热会熔化成液态,冷却后又会凝结成固态,说明加热和冷却可以改变物体的
(4)这个实验说明热在固体中传递时,从温度
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