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A.动能转化为静压能
B.位能转化为静压能
C.位能转化为动能
D.动能、转化为位能
下列事例中，属于内能转化为机械能的（ ）。
A．水壶中的水沸腾后，壶盖被水蒸气顶起
B．两手相互摩擦，手心变热
C．用气筒给自行车胎打气时，气简会发热
D．流星与空气摩擦生热、发光
C、B是机械能转换成内能，D是机械能转换成内能和光能。
：下列事例中，属于内能转化为机械能的（ ）。
A．水壶中的水沸腾后，壶盖被水蒸气顶起
B．两手相互摩擦，手心变热
C．用气筒给自行车胎打气时，气简会发热
D．流星与空气摩擦生热、发光
B. 蒸汽机，内能转化为机械能
C. 发电机，电能转化为机械能
D. 植物的光合作有，光能转化为化学能
B.热量
C.动能
D.内能
摘要:内能与热机测试题班级：姓名：选择题1、关于能量转化说法正确的是()A.砂轮磨刀有内能转化为动能B.陨石进入大气层成为流星时内能转化为机械能C.壶中水沸腾时壶盖跳动是水的动能转化为壶的动能D.给自行车打气气筒发热机械能转化为内能2．关于物体内能的改变，下列正确的是()A.物体对外做功物体内能减少B.物体吸收热量物体内能一定减小C.对物体做功时，物体内能一定减少D.物体放热时，物体内能一定增加3．在下列现象中，通过做机械功来改变物体内能的是()A.利用电炉把水烧开B.冬天里两手互相摩擦使手暖和C.冬天天气寒冷时要生火取暖D.用电焊机焊接金属使金属熔化4．甲乙两物体质量相等,甲物体温度降低20℃,乙物体温度升高15℃时,乙物体吸收热量是甲物体放出热量的2倍,甲乙两物体比热比是()A.3:8B.8:3C.4:3D.3:25．燃烧甲、乙两种燃料，甲放出的热量比乙多，则()A、甲的质量一定大B、甲的热值一定大C、甲的比热容一定大D、条件不足无法判断6．下面现象中，属于内能转化为机械能的现象是()A、两决块相互摩擦，冰块熔化B、水蒸汽推动活塞做功C、压缩气体，温度升高D、用太阳灶烧水7．从能转化的观点来看，摩擦生热的现象是()A、机械能转化为内能B、内能转化为机械能C、化学能转化为内能D、内能转化为动能8．有关物质的比热容，下列说法中正确的是()A、比热容跟物体的质量有关，质量越大，比热容越小B、比热容跟物体的温度有关，温度越高，比热容越大C、比热容跟物体吸收或放出的热量有关D、比热容是物质本身的一种特性，与物体的温度、质量都无关9．在下列几种情况中，比热容会发生变化
B.电饭锅烧饭——电能转化为内能
C.热机工作 ——机械能转化为内能
D.太阳能电池——太阳能转化为电能
B.电饭锅烧饭——电能转化为内能
C.热机工作——机械能转化为内能
D.太阳能电池——太阳能转化为电能
B. 蒸汽机，内能转化为机械能
C. 发电机，电能转化为机械能
D. 植物的光合作有，光能转化为化学能
MTP装置烃压缩机透平的工作原理是（）。
- A、机械能转为内能
- B、内能转为机械能
- C、电能转为内能
- D、内能转化为动能
正确答案:B
乙烯装置裂解气压缩机透平的工作原理是（）。
- A、机械能转为内能
- B、内能转为机械能
- C、电能转为内能
- D、内能转化为动能
正确答案:B
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