九年级物理书答案？答案：鸡蛋放在盐水中，过一段时间就会变咸；在卫生间的一角滴上一滴香水，整个卫生间都能闻到香水味。2． 分别在冷水杯和热水杯中放入糖块，经过相同的时间后，品尝杯中的水，哪一个更甜？为什么？答案：热水更甜。因为热水温度高，糖溶化后扩散得快。那么，九年级物理书答案？一起来了解一下吧。
九年级物理答案..急
第一题A
这一题考相对运动，C，D不用解释，B正确是因为乘客所坐的车速度比被观察的车速度慢。
第二题D
这一题考力矩，杠杆平衡是因为两个相反方向作用的力矩相等。
第三题C
这一题考气流流速与压强的关系，流速越大对接触面的压强越小。
第四题
不知道这里的邮轮质量是指空载还是满载。
如果是空载，质量就是5000000，如果满载，质量就是15000000。后一个空格的答案是前一个空格答案乘以10。
第五题
平行于弹簧伸缩方向的力；4；8。
第六题
100J；0J；10N
恒力做功等于力的大小乘以物体在力的方向上运动经过的距离。因为是匀速运动，摩擦力和拉力是一对平衡力，大小相等，方向相反。
第七题
输出；输入；100%或1
之一题考概念，类似于背书。
第八题
小；大；把人推向车身
这和之前风筝的题目考的是同一个知识点。
第九题
同学爬楼的时间t、楼房的高度h；秒表、皮尺；mgh/t
回答完毕。
珍爱生命小短文 急
珍爱生命，拒闯红灯As you know，the rules of the traffic is very imporTant. But recently there are some pedesteians always run red lights who didn"t realize the bad results becamse of their behaves. For example, disturbing the normal turns of the traffic, causing a series of aidents danger for people's lifies and bad spirit in society . Of cause if you broken the rule you would be punished like warning and paying the money for your behave. In my opinion,obey the rules of traffic is the responsibility of evevryone but not the thing we have to do under other people's asking. love life,refuse running red lights!珍爱生命爱护地球I recently read, "If the Earth's remaining three days of life" feeling a lot of this article. This essay describes is this: the Earth has only three days of life. "I am" very alarmed, even the insects are usually afraid of death I will now have to face the advent of very frightened. By this time, "I" know that there are a lot of good things, but I have not noticed. In three days I have met a lot of things, gradually bees the mind. Three days have passed, and the face of death to e, but I did not drop tears fall.
From this writing that I learned that the world is beautiful, there are many beautiful things. Sometimes, although there are some disappointments, but this is also an experience, a very rare experience. If and when their lives will be at the end, she wanted to experience the experience is unlikely.
This essay I recognize that life is very precious. Whenever I see a news item that some university student who can not stand the pressure to learn, suicide or run away from home, my heart was always in pain. Although I know that their learning is very bitter, but it should not mit suicide 呀! He should also think about their own future, their own well-being of the future, must not be so easily give up their lives.
This is an essay also let me know: you should be able to support hard, withstand temper. Only be able to support the pain in order to withstand temper yourself to bee stronger, and better academic performance also will be able to. When his clas *** ates had a great admiration a character, may have thought of these great men, he had the number of sweat flow, after the number of endurance test was the remarkable results of everybody distressing 呀!
Reading, reading, I can not help but think of our mon homeland of humanity - the Earth. Our technology may be developed than ever before, and perhaps our food, clothing, shelter, a lot better than before, but have you ever thought that in we are developing at the same time, the earth has not aged. Of view, the former brook no longer exist, replaced by a suession of people met on the disgusting *** ell ditch; before the air is very fresh, but now the air and bad days than in the past is simply to do 呀 .. ....
Let us cherish life, caring for the earth, doing a live a worthy person bar.
实习工作总结 急！!
我只能告诉你怎样写好，感谢领导+对公司的认识（很重要）+对岗位认识+成绩+不足+下一步目标，最重要写出自己的信心
这道题怎么写啊？急
x+5/6x=11/9
17/6x=11/9
X=22/51
急！请面板专家帮忙！
温馨提示：回复只是给您提供参考意见，不能代替临床诊断。
物理公式 电流 定义式I=Q/t
欧姆定律 I=U/R
串联电路I=I1=I2，并联电路I=I1+I2
电压 串联电路U=U1+U2 ，并联电路U=U1=U2
电阻 串联R总=R1+R2 ，并联R总=R1R2/(R1+R2)
电功率定义式P=W/t普适公式P=UI
电功 定义式W=UIt
已知电功率W=Pt
已知电量W=UQ
导体热量 焦耳定律Q=I2Rt
面积正方形S=a2 ，长方形S=ab ，圆S=π（D/2）2
体积 柱体V=Sh ，排液法V固=V2-V1 正方体V=a3
浸没时V排=V物
速度 定义式v=s/t 平均速度v=s总/t总
密度 定义式ρ=m/V
重力 G=mg
浮力 公式法F浮=ρ液gV排称重法F浮=G-F' 漂浮和悬浮F浮=G
阿基米德原理F浮=G排 产生原因F浮=F向上-F向下 沉底时F浮=G-N
压强定义式p=F/S
液体内部p=ρgh
功率(机械) 定义式P=W/t 汽车功率P=Fv 功(机械) 定义式W=Fs 总功W总=W有用+W额
杠杆平衡条件 F1l1=F2l2 力 同方向F合=F1+F2 反方向F合=F1-F2
水平桌面上受到物体的压力F=G总
液体、气体的压力F=pS
机械效率 定义式η=W有用/W总 提升重物η=Gh/Fs 水平移动重物η=fs物/Fs
热量 燃料燃烧Q=qm 物体吸放热Q=cmΔt
机械能 机械能=动能+势能 Q=U^/Rt Q=I^Rt
3.W=15/3000Kw.h=18000J
P=W/t=18000/60w=300w
4.R=U²/P
P实=（80%U)²/R=640W
5.W1=P1t=100×0.06×4J=24Kw.h
W2=P2t=100×0.04×4J=16Kw.h
△W=(W1-W2)T=(24-16)×365Kw.h=2920Kw.h
1．瓶口朝上时，受到水向下压强，使橡皮膜向内凹，瓶口朝下时，受到水向下的压强，使橡皮膜向内凹。因为液体的压强随深度的增加而增大，橡皮膜在下端时比上端时的深度大，受到水的压强比在上端时大，所以橡皮在下端时比在上端时凹进更多。
2．因为细长容器中液体深度大，所以细长容器底受到的压强更大。
3.P=ρgh=1030×10×50=515000Pa
4. P=ρgh=1000×10×130=1300000Pa
1-因为受到了水的压力。因为液体下面压强比上面压强大
2-第二幅，因为第二幅液体较高
3-已知：h=50m
求：P
解：P=phg=1.03×10 3kg／m3×9.8N=5.047×10 5pa
4-已知：h=130m
求：P
解：P=phg= 3kg／m3×130m×9.8N=1.274×10 6pa
以上就是九年级物理书答案的全部内容，第1节 光的直线传播 第一部分：知识点 一、 基本概念：1、光源：能够发光的物体叫光源。 分类：自然光源，如 太阳、萤火虫；人造光源，如 篝火、蜡烛、油灯、电灯。 注：月亮本身不会发光，它不是光源。2、规律：光在同一种均匀介质中是沿直线传播的。3、内容来源于互联网，信息真伪需自行辨别。如有侵权请联系删除。
