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Anonymous users2024-02-05The magnetism of the individual points is not the same.
The magnetic force is strong and weak.
It is easy to slip on the other side and repel or suck it up.
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Anonymous users2024-02-04Yes, just do some processing, isn't the maglev train floating with magnetic power?
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Anonymous users2024-02-03There are two types of balancing, such as nailing one end of a wooden strip to the wall, regardless of friction.
When the bar is vertically downward, it balances, and if this balance is broken, for example, if the bar is rotated by an angle, the bar will return to its original balance after the external force is removed.
When the wooden strips are vertically upwards.
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Anonymous users2024-02-02It can also be balanced, if the balance is broken, then it can not restore the original situation, the suspension of the magnet belongs to this case, in practice, it is difficult for you to find the balance point, even if you find it, a little bit of interference (such as the flow of air) will make the balance broken, no longer restored, the performance is that it can not float.
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Anonymous users2024-02-01Theory is achievable, and it is also achievable under specific test conditions, and a key point is that the two magnets should be relatively absolutely stationary, because the equilibrium point is a very small range.
But it is not possible to hold it in the hand, and there is no way to guarantee absolute balance in the hand. It can't be done.
Hope it helps.
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Anonymous users2024-01-31The problem you are talking about is a question of the balance of forces. It is important to know that the two forces are equal, and it is difficult to establish a suspended state in a magnet. This state requires many conditions to be satisfied, and the high precision of the two forces cannot be achieved by hand to balance the two forces.
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Anonymous users2024-01-30Very simply, in the case of series connection, in order to ensure that the electrical appliances are not damaged, the trunk current should be small, then u=i(r1+r2)=
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Anonymous users2024-01-29x103x240=240000kg(3) to find work, the basic formula: w=fs, that is, the distance in the direction of force multiplication, here, isn't the force the force of the pump? And if the pump wants to pump all the water, should the force used be equal to the full gravity of the water?
i.e. f=g) so find the gravitational force of water g: g=mg=240000x10=2400000n. And the distance is 2 meters, because the pump is two meters high, and the water moves 2 meters high.
Therefore, w=fs=2400000x2=4800000j(4) to find the time, pay attention to the unit unity 2
4kw=2400w。The basic formula: time = work power. t=w p=4800000 24000=200s, which can be pumped in 200 seconds.
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Anonymous users2024-01-28Utilize the principle that the contours of the Sun and Moon coincide during a solar eclipse.
There is a solar radius Moon radius = Earth-Sun distance Earth-Moon distance.
Therefore, the radius of the sun = the radius of the moon * (the distance between the earth and the moon) is calculated by itself.
Is the gap big?。。 When he beat Frieza Goku, he was obviously injured more than Dal, and the strength of the Realm King Fist was naturally a little stronger. When fighting androids, Goku and Dahl surpassed the future Trunks.,Goku is stronger It's just your feeling.,No one has ever talked about it.。。 >>>More
You're asking the right person; I used to pretend to have such a problem, and I haven't been able to pretend to be the one you said; It is because the main boot area of the hard disk is lost and cannot boot normally; In fact, the system is already installed; It's just that there is a problem with the C disk booting; One way is to use the installation disc with System Boot Repair to boot into the system first; Then right-click on my computer, select management, and then disk management, right-click on your c drive on the right, select as the active partition, and then restart the computer to enter normally; Another way is to take off the hard disk and install it on someone else's computer, and also set it as the active partition in Disk Management. Or you can use Diskman partition software to activate the C drive; But I don't know if I don't know if I don't know how to use this software or what, I still have the same problem after activating it; Later, it would be nice to set it to the active zone, I hope it can help you.
You have installed Microsoft's latest anti-piracy patch.
You have an icon with a little star in the bottom right corner, right? >>>More
q=w=pt=u²/r×t∵t1：t2=1:2,r1:
r2=2:1, so 1min in parallel, q1=1 10q total, q2=1 20q total, t=q total (q1+q2)=1 (3 20)=20 3min >>>More
Erhu is best to find a teacher to teach alone, especially if you have such a good ** foundation, if you just learn by yourself, or follow the progress of the ordinary class, it will be a waste of time, let the teacher teach you quickly alone, it should be about the same in 2 months, and it can generally reach a medium level, after all, erhu is different from the piano, especially erhu is based on feeling to touch the sound, but because your piano foundation is very good, so your pitch should be great Come on, don't fall every day, Let the teacher arrange your time and schedule scientifically and reasonably, and your progress will be very fast. Note that you must listen to more erhu songs during the erhu practice, so that you can cultivate your feelings. I don't want to say more about how many levels you can get in a few months, because I feel that there is really no meaning in the exam, if you just want to learn a musical instrument for the sake of the exam, it is too useless, and the exam sometimes restricts your own development, I was grade 10 5 years ago, I feel very boring, to be honest, I can get grade 10 in the second year, my learning intensity is to study two hours a week, I think you will succeed!