(1)探究不同物质的比热容时,应选择
(2)在探究“不同物质吸热升温的现象”时,根据所测数据画出了如图丁所示图像(不计热量的损失,两液体温度都未达到沸点),由图可以看出由图可知
(3)比较不同燃料的热值时,应选择
(4)若图甲烧杯中为50mL的水,若10g酒精燃烧后放出的热量被水吸收,温度计示数升高了20℃,则可以计算出酒精的热值
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