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Does ampere force do work? Why
If the wire moves in the direction of Ampere force, then ampere force does work. If the wire does not move or moves in the direction perpendicular to ampere force, then it does not work
Infinite cycle energy; a racing car is driven by battery, and then the mechanical energy generated by the wheel is converted into electrical energy and stored in the battery. Is it feasible?
No way
This is similar to the question of egg or chicken
Of course, we can learn about machines from history, but not chickens
It's an infinite loop, as you say
For example, if you can make an engine that uses water as fuel, you will be rich
Excuse me: what is the smallest negative number? - can 0.0 (0 infinite loop) 1 be converted into a fraction?
In addition: (1,2,3 Add the sign "+" - "in front of 20092010 and add them to get the smallest non negative number. What is it? I don't understand! O (≥ V ≤) O~
So why do many people say it's 1? (it's 0 until 2008, and then - 2009 + 2010 = 1?)
There is no minimum negative number. If you have to find the minimum, it is negative infinity. 0 is the number with the minimum absolute value, which can be said to be positive or negative
1 into a fraction, the same denominator on the line
Put 1, 2, 3 These numbers are preceded by "+" - ", that is, they are randomly changed into positive or negative numbers, and then added to get the smallest non negative number
Take 1, 2, 3, 4 as an example. Add the sign "+" - "to change it into - 1, 2, 3, - 4. The sum of four numbers is 0, and so on. After that, the sum of every four adjacent numbers can be 0, because 2010 can be divided by 4, so the minimum non negative number that can be obtained is 0
What should be the simplest form of fraction to change the infinite circular decimal 3.142857142857142857 ································································?
22 / 7 this fraction circulates in 3.142857. Divide the decimal part into 3 and 0.142857. Divide the decimal part by the same number of cycles. For example, 0.3333. Divide 3 by 9 and it is equal to 1 / 3. As mentioned above, if the integral part is added, it is equal to 22 / 7
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