I wonder if there is such a large scale.

If there is/anything

Divide the apple into three parts and press 3, 3, 4 points.

Put two thirds on each side first.

If the imbalance is 9, then 2/2 must be the lighter side.

It is easy to find two boxes from the lighter side and put them on, so you can know which box is 9 pairs/piece.

If it is balanced, it is the third box; if it is unbalanced, it is the light box.

So you only need to weigh it twice.

If the balance 9 is two/two, it must be in four boxes.

Divide into 2 2

Keep your weight 9. Two/two is definitely light.

At 1

Keep weighing, and you will get 9 pairs/piece.

This needs to be weighed three times.

The chances of survival of the first and second are equal. The key to their success is to see how others respond.

Because the ones behind can't see the previous numbers, they can only see the remaining numbers. . . So if the first one takes n, the second one takes N+ 1 or N- 1, if he doesn't take N+ 1 or N- 1. It will give the third chance to get the number between them, so the second one will only get N+ 1 or N- 1. . . And the third one will get the sum of the first two people according to the number left in the bag. He will try to get as close as possible to the number they took, but they are different. When the current sum of two people is 2N+ 1, the third person can take N+2 or N- 1, and when the current sum of two people is 2N- 1, it can take N-2 or N+ 1. . .

The fourth person will also choose the number of pills to take after dividing the sum of the first three people by three, but the average at this time may not be equal to n, and he will choose a new average plus or minus two pills to take, but it must also be related to the number of pills taken by the first three people.

The fifth person actually has no chance to live. He is only used to decide which of the first four people will accompany him to death. .

Now let's assume that the order of picking beans is a, b, p, d and e.

If a takes n, b takes N+ 1, c takes N+2 and d takes N+3, then at this time, if the number of pennies is equal to the number of pennies >; N+3 means that A and E are dead. . . Wait a minute. . . .

Dina beans can never be inserted between Party A, Party B and Party C ... . Propane beans can never be inserted between a and B. . .

The four of them are arranged as follows: (in descending order of bean number)

a，B，D，D，C，D，C，D，C。

Plus the key person e.

e A B D A P B D B D B B B。

a，B，D，D，D，D，D，D，D，D，D，D。

The outermost is the maximum or minimum number, that is, the dying person.

It can be seen that the probability of death is 8/8, and the probability of survival is 0/8.

Ding has a 4/8 chance of death and a 4/8 chance of survival.

C has a 2/8 chance of death and a 6/8 chance of survival.

The probability of death of A and B is 1/8, and the probability of survival will be 7/8.

It doesn't matter how many you take in the first one, but it's important to keep the standard example of five: if you take 1 at the beginning and the second person takes four, then you take three and the second person takes two, so that the second person will keep five forever. Of course, you get five, and the second person also gets five. So the first person will lose, but if the first person takes 65438+,

Momentum is equivalent to the impact of a 30-pound object falling from a height of 20 feet.

m=20,v=(2gh)^( 1/2)=20

The unit conversion is not clear, so don't use the unit.

P = mv = 400 & lt=54v 1，v 1 & gt； =400/54=200/27=7.4 1