试题与答案

计算题:三效蒸发装置中,每台加热室面积为F=250m2,其产碱强度为4kg/(m3.

题型:问答题 简答题

题目:

计算题:三效蒸发装置中,每台加热室面积为F=250m2,其产碱强度为4kg/(m3.h),求该系统年产能力为多少万吨?(年生产时间为7000小时)

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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如图所示,劲度系数为k的轻弹簧,左端连着绝缘介质小球B,右端连在固定板上,放在光滑绝缘的水平面上.整个装置处在场强大小为E、方向水平向右的匀强电场中.现有一质量为m、带电荷量为+q的小球A,从距B球为S处自由释放,并与B球发生碰撞.碰撞中无机械能损失,且A球的电荷量始终不变.已知B球质量为A球质量的3倍,A、B小球均可视为质点.求:

(1)A球与B球碰撞前瞬间的速度v0

(2)求A球与B球第一次碰撞后瞬间,A球的速度v1和B球的速度v2

(3)B球被碰后的运动为周期性运动,其运动周期T=2π

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