In my opinion, all Mr White________ good to his students in his class at present. He is very strict in their study.
A:does does does
B:does did do
C:does does do
D:did do does
实验测得0.5kg某物质温度随时间变化的图象如图示,已知物质在固态下的比热容为C1=2.1×103J/(kg℃).假设这种物质从热源吸热的功率恒定不变,根据图象解答下列问题:(1)在最初的 2min内,物质吸收的热量为多少?(1分)(2)求该物质在液态下的比热容C2。(3)若规定“质量为1Kg的某种晶体物质在完全熔化时所吸收的热量叫做这种物质的熔化热” 用“λ”表示,根据图像信息,计算该物质的熔化热。
刘大妈做一批工艺鞋,第一天做了8双,第二天起手艺越来越熟练,每天都比前一天多做2双,最后一天做了24双.她一共做了几天?
已知下列信息:a.
b.