Primarygun

In the reaction between calcium hydroxide and sulphuric acid, the concentration of each one plays an important role to the formation of salt. If you don't want to have acid salt as the product as it lowers the pH value, what's the ratio of H2SO4 to Ca(OH)2 do you choose? 1:2? or 1:1?

In these exercises, friction is always neglected unless the mass of earth is given.

anyone helps me ?

You may find out the rate of carbon dioxide uptake and released of several leaves.

There will be no waves for the transerve wave any more after a period of time, why? Disturbance is added, it starts to move. Where does the energy lose? Why do the particles always try to archieve at their equilibrium level(position)?I can understand the energy loss in longitudinal wave but not transverse wave. Please explain it to me. Water wave can be transerve wave and longitudinal wave, right? What happens if the energy is not totally lost? It rebounds? Why do the particles always try to archieve at their equilibrium level(position)?

Both must be conserved. Law of conservation is totally supported by Newton's third law.

, I got a bad glance on the unit

I don't have the CD.

You're welcome.

What conclusions do you want to draw? What's the aim of this experiment?

1.If you are finding the speed of the passengers to the man on the ground relatively. His speed is 100ms^-1 when the car hits the other at the particular short time interval. 2.If you are finding the speed of the passengers to the seats relatively. That's a bit difficult. The speed of the car varies as time passes. You need to specify the particular time moment first. The weight of the car for case 2 has effects on the "relative" speed of the passengers. It has no effects in case 1.

I've got some new data about the condition of my computer. One of the memory indeed has faults. Show you two photos. But, I still find that it spends lots of time on booting even it detects one of the stickers is faulty. Is that normal?

I've heard of this question just several months ago. http://www.ylmass.edu.hk/~mathsclub/ILC/Decision/index.html

the blue screen

Seldom. Yes. ok thanks

No. Where can I have a look on the updates downloaded? The incident began in one day. My computer has a lot of problems. As I mentioned in another thread, it needs a lot of time to power up when I cut the electricity.( I know currents are passing it, it is the hardware problem, I think) Now talk about the latest problem. It reboots all the day since that day. I didn't install any software or hardware in that month. I have several major updates by the Window XP HELPER (I don't know its exact name, every window user can use it, it has been installed already). My normal process of operating. 1.Intel brand screen 2.Window loading screen. 3.User login screen 4.Desktop The process is stopped by something ( Errors in software,hardware or virus). Then it reboots again and goes into 1.. Later, maybe half a hours or several ten minutes, I am able to login. Then ok. Sometimes, my monitor suddenly turns black in screen, the power swtich goes brown. With this light, I don't know how many things it indicates. But I know one thing, it usually reveals that my Computer has not started yet.

I think he thinks that creating a new term " momentum " is not necessary.

It reboots all the time. Once I entered into my window, there is 50% chance of rebooting automatically.

I think my computer is one hundred times indeed need to work under a cooler condition. Britain is very cold, but I love the snow.

So you mean use Fd to describe the motion of an objects? What if an object moves with constant velocity? There is no "external net force" acting on it. Fd is better used to describe the "potential" of an object.

Hello everyone, Today I saw some waves in my physics lessons. A stone drops into water, and waves are created and spread from source to surroundings. Finally, the water became calm again. What's the most proper explanation for that? I think: Water molecules gain energy after being hitting, they collide the others. By law of conservation of momentum, it is rather obvious to see the total amount of kinetic energy decreases after a collision. Finally, it becomes 0. Is my explanation correct?

In fact, momentum is usually used to describe the movement of colliding objects. If time increases, displacement increases(take absolute value).If displacement increases, more time is needed, holding other variables being constant. In general, if you can't describe work done by momentum in some difficult or easy ways, then it is not mechanics. They are always related as you have mentioned. That's my thought.

Oh, I've taken a screen before. However, some codes cannot be seen. It's .................XXXX 0x00002EEO,0X0000009,0xF86D644B) address F86D644B base at F86D6000, DataStamp 41107ecc

No No. However, my computer continues to reboot reveals that the problem is still present.

Anyone is free to answer me?