题干

汽车是常见的交通工具,它应用了很多方面的物理知识和技术,它在给我们带来交通便利的同时,也给我们带来了环境污染、交通安全等一些社会问题.请你运用所学的物理知识简要回答下列问题:

(1)汽车发动机的冷却剂常选用水的主要原因.

(2)油罐车运输时为什么在地上拖一条铁链?

上一题 下一题 0.0难度 选择题 更新时间:2019-10-20 10:09:18

答案(点此获取答案解析)

答:(1)由于水的比热容大,吸收相同的热量,水的温度升高量小,因此汽车发动机的冷却剂常选用水.

(2)油罐车在运输过程中,与周围的空气不断摩擦,使油罐车带上静电,油罐车带电后,容易发生放电现象而发生火灾,因此油罐车运输时地上拖一条铁链,以便把静电及时导走,避免发生危险.

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    Paradise Time Travel Bookstore

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    The Paradise Time Travel Bookstore is located near the princess Wencheng Theater in Lhasa(拉萨).

    Poplar Kid's Republic

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    The colorful designs inside are aimed at encouraging kids to explore books. Pushing the glass doors open, you will see children's drawings and craftworks(工艺)hanging on the pink walls, leading you into a world full of imagination.