Physics Liquid Strong Conclusion I have doubts

The first floor may be misunderstood, I'll figure it out:

Lengthening the object does increase the pressure difference, but the force area decreases, f-ps, and generally does not change.

Try to relate to real-life examples, even if you don't understand them for a while, don't be impatient. Sometimes, after a while, nature understands.

I'm also in junior high school, so I wasn't used to conclusions at first, but now I'm also learning physics very well. If you don't understand anything, just mention it, maybe I can help you.

A book is provided, which is good!

Junior High School Physics Textbook Knowledge Packet

Editor-in-Chief Liu Zengli, Beijing Education Press).

Under the action of constant force, the wire frame accelerates the movement, but when entering the magnetic field and exiting the magnetic field, the ampere force received by the induced current cannot be compared with the constant force, and the speed when entering and exiting the magnetic field cannot be compared, and the width of the magnetic field is unknown, so it may not be possible to judge which Joule heat is larger and which is smaller according to the existing conditions.

It is quite correct to say that according to the kinetic energy theorem, specific problems should be analyzed on a case-by-case basis.

The conclusion of this sentence should be that the same wire frame passes through the magnetic field under the action of constant force, and the greater the velocity, the greater the Joule heat generated.

The fact is that it objectively exists in reality, for example, if you throw an ordinary mobile phone into the water, it will be broken, and you will still break it, so it is a fact that the mobile phone will be broken if you throw it into the water, and the conclusion is a conclusion based on the facts, because the conclusion is generally required to be correct, so the conclusion is generally summarized through multiple facts, and to put it bluntly, the conclusion is a collection of multiple objective facts, for example, If you throw different types of ordinary mobile phones into the water, they are all broken, then you can conclude based on objective facts that the phone will break if you throw it in your hand. I don't know how to ask, I hope it will help you.

Facts are what we commonly imagine. For example, in the Galilean inclined plane test, the ball will slide from one inclined plane to another, which is a fact. In addition, it is also true that when you stop applying thrust to the flat trolley, the trolley will come to a slow stop.

Correspondingly, the result from this is the conclusion, getting out of the car and stopping because of the action of friction, and the force is the reason for changing the motion of the object.

Facts are what you see, what you feel, and conclusions are inferences based on facts.

Facts are phenomena, things you can observe in experiments.

I don't know how to ask questions.

is the result of the action of gravity. Because the direction of gravity is vertically downward, objects near the earth are affected by gravity, and his fall is caused by gravity, and the friction of air against him is resistance.

Hope it helps

Friends who ask questions on the mobile phone, please comment on the [satisfied] in the upper right corner of the client. Your adoption is the driving force for me to move forward

It is the gravitational force of the object, and the drag only hinders its inertia and prevents it from flying farther.

cubic decimeters = cubic meters = 10,000 cubic centimeters.

m total = v = cubic meters * kilograms per cubic meter =

m = 25-5 = 20g

m leftover v = 20g 10,000 cubic centimeters = grams per cubic centimeter = 2 kilograms per cubic meter to give points.

CM total = v = 10 cubic decimeters * kg per cubic meter = 25g

m = 20g

m left v=20g 10 cubic decimeters = 2 kg per cubic meter.

The rocket is running in space and what is the object of force, not in the atmosphere, everything has gravity, mainly the gravitational force of the earth and the thrust of the engine.

You understand that there is a misunderstanding that the meaning of being uncharged is not that there is no charge, but that the algebraic sum of positive and negative charges is 0, for example, I have 5 positive and 5 negative, then they are neutralized, so they are not electrically visible.! There is also a positive charge that does not move. Only a negative charge moves!!

Electron transfer on an electroscope is positively charged because it loses electrons itself.

It's not accurate, it's not that the positive charge doesn't move, the negative charge moves, it's the electrons that move.