有没有物理狂人拯救帝帝帮忙算个得数！！！！

来源：蜘蛛抓取(WebSpider) 时间：2011-09-26 05:09 标签： 直接写得数
有没有物理帝帮忙算个得数!You are riding in a boat whose speed relative to the water is 4.9 m/s.The boat points at an angle of 24.1° upstream on a river flowing at 15.1 m/s.Find the time it takes for the boat to reach the opposite shore if the river is 24.6 m wide._百度作业帮
有没有物理帝帮忙算个得数!You are riding in a boat whose speed relative to the water is 4.9 m/s.The boat points at an angle of 24.1° upstream on a river flowing at 15.1 m/s.Find the time it takes for the boat to reach the opposite shore if the river is 24.6 m wide.
You are riding in a boat whose speed relative to the water is 4.9 m/s.The boat points at an angle of 24.1° upstream on a river flowing at 15.1 m/s.Find the time it takes for the boat to reach the opposite shore if the river is 24.6 m wide.
水速为15.1,船相对河水速度为4.9,船逆游,和河流的垂直方向的夹角为24.1°,河宽24.6m,问多久到达对岸.船速逆流,相对岸的速度为15.1+4.9将这个速度再垂直和水平方向分解,垂直方向就是用来过河的,水平方向的是随波逐流的,无用.垂直速度为（15.1+4.9）*cos24.1°那么时间为24.6/【（15.1+4.9）*cos24.1°】
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您可能关注的推广回答者：有没有物理帝帮忙算个得数The deepest place in all the oceans is the Marianas Trench,where the depth is 10.9 km and the pressure is 1.10 multiplied by 1.1x10^8 Pa.If a steel ball 8.5 cm in diameter is taken to the bottom of the trench,by how much does its volume decreas_百度作业帮
有没有物理帝帮忙算个得数The deepest place in all the oceans is the Marianas Trench,where the depth is 10.9 km and the pressure is 1.10 multiplied by 1.1x10^8 Pa.If a steel ball 8.5 cm in diameter is taken to the bottom of the trench,by how much does its volume decreas
The deepest place in all the oceans is the Marianas Trench,where the depth is 10.9 km and the pressure is 1.10 multiplied by 1.1x10^8 Pa.If a steel ball 8.5 cm in diameter is taken to the bottom of the trench,by how much does its volume decrease?
the question is not difficult,you can think it carefully and get it because of approximately collision,with theorem of momentum and conversation of
答案 1，单位自己选择有没有物理帝帮忙算个得数_百度知道
有没有物理帝帮忙算个得数
he fundamental of an organ pipe that is closed at one end and open at the other end is 288？？？mlonger pipe.3 Hz (middle C). What are the lengths of these two pipes? shorter pipe. The second harmonic of an organ pipe that is open at both ends has the same frequency
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出门在外也不愁有没有物理帝帮忙算一个得数!The Shinkansen, the Japanese &bullet& train, runs at high speed from Tokyo to Nagoya. Riding on the Shinkansen, you notice that the frequency of a crossing signal changes markedly as you pass the crossing. As you approach the crossing the f_百度作业帮
有没有物理帝帮忙算一个得数!The Shinkansen, the Japanese "bullet" train, runs at high speed from Tokyo to Nagoya. Riding on the Shinkansen, you notice that the frequency of a crossing signal changes markedly as you pass the crossing. As you approach the crossing the f
The Shinkansen, the Japanese "bullet" train, runs at high speed from Tokyo to Nagoya. Riding on the Shinkansen, you notice that the frequency of a crossing signal changes markedly as you pass the crossing. As you approach the crossing the fre as you recede from the crossing the frequency you hear is 5f /9. What is the speed of the train?
新干线是日本的子弹头火车,在东京到名古屋一线高速行驶.乘坐在新干线列车上,当经过道口的时候,你听到道口的（声音）信号的频率发生了明显的变化.当你接近道口的时候,你听到的频率是f；当你远离道口的时候,你听到的频率是5f/9.试求列车的速度.吐槽：新干线列车是封闭的,你不太容易听到外面的声音……声速v0=340m/s,设列车速度为v.则(v0+v)/(v0-v)=f/(5f/9),计算出v=2v0/7,即列车的速度是声速的2/7,即97.1m/s,或349.7km/h.
日本新干线的,日本的子弹头火车,跑向高速从东京到名古屋。骑在日本新干线,你留意到一个十字路口信号的频率变化明显你们通过交叉路口。当你靠近十字路口你听到的是频率f;当你穿过频率时你听到5 f / 9。什么是那列火车的速度吗?
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