There are 24 teams participating in the final of a football match. They are divided into six groups to carry out the round robin and decide the top 16 teams. These 16 teams carry out the elimination match according to the determined procedure and finally decide the first, second, third and fourth teams. How many matches do they need to arrange in total?

Round robin stage: 3 + 2 + 1 = 6 (games) for each group, 36 games for 6 groups; knockout stage: 8 games for 16, 4 games for 8, 2 semi-finals, 1 final, 1 final for 3-4; total: 36 + 8 + 4 + 2 + 1 + 1 = 52. A: 52 games in total

Mathematical inference of civil servants (1.5.9.14.21 what's the next digit)

31
1 5 9 142131
\ / \ / \ / \ / \ /
4 4 5 7 10
\ / \ / \ / \ /
0 1 2 3

220 V 2.5 A (5a) what is the maximum power consumer that can be connected to the meter?

P = u * I; 220 V * 5A = 1100 w = 1.1KW; theoretically, 1.1KW electrical appliances can be connected at most

How to prove the theorem of nested intervals by the principle of supremum?

The upper bound of a nested interval takes any lower bound as the lower bound, and the lower bound takes any upper bound as the upper bound, so they are all bounded sequences, so there are limit points. It can be further proved that the two limits are equal, so only one point is in the nested interval

Is the formula P = UI? U 380V or 220V for calculating the line current of three-phase four system line?

Is the formula P = UI? U 380V or 220V for calculating the line current of three-phase four system line?
Who told you this formula? It is used to calculate the single-phase AC load. If it is a single-phase power supply, the voltage is 220 v. the characteristics of AC power supply are: the voltage between the three live wires is 380 V, while in the case of load balance and no offset of neutral point, the voltage of any one of the three live wires to the zero wire is 220 v
The line power calculation formula of three-phase four system line is
P=1.732UIcosФ
Where u is the line voltage, 380V
The calculation of current is as follows:
I=P/1.732UcosФ.
Remember: P is in kilowatts
The unit of u is kV
Cos Ф is the power factor, generally between 0.80 and 0.85, depending on the change of your compensation
No matter what connection you make, the external current is calculated in this way. The difference is that the internal voltage of the three-phase motor will be different with different connection methods, and the line current flowing through the coil will also change, so the power of the motor will also change
Advise people who don't understand like the first floor and the second floor not to answer indiscriminately, which makes people laugh and mislead their children!

(2y-5) ^ 2 = (Y-3) (6y-15)

(2y-5)^2 = (y-3)(6y-15)
4y^2-20y+25=6y^2-33y+45,
4y^2-6y^2-20y+33y+25-45=0,
-2y^2+13y-20=0.
2y^2-13y+20=0,
(y-4)(2y-5)=0,
y1=4,y2=5/2

After connecting 25W, 220V incandescent lamp and 60W, 220V incandescent lamp in series, the brightness of two lamps is compared

After series connection, the voltage of 25W bulb is 155v, and that of 60W bulb is 65V, so the power of 25W lamp is high, so 25W lamp should be on

X4 + MX3 + nx-16, where there are factors (x + 1) and (X-2), find m + n =?

Let x ^ 4 + MX ^ 3 + nx-16 = (x + 1) (x + 2) (x + a) (x + b) = x ^ 4 + (a + B + 3) x ^ 3 + (2 + 3A + 3B + AB) x ^ 2 + (2a + 2B + 3AB) x + 2Ab, then M = a + B + 30 = 2 + 3A + 3B + ABN = 2A + 2B + 3ab-16 = 2Ab, so m + n = 3A + 3B + 3AB + 3 = (2 + 3A + 3B + AB) + 1 + 2Ab = 0 + 1 + (- 16) = - 15 no check

As the circuit shown in the figure, in the process of sliding plate P of sliding rheostat moving from end a to end B, the indication of ammeter ()
A. From big to small B. from small to big C. from big to small D. from small to big

According to Ohm's law, the current in the circuit is the largest; when the slide is not at both ends of the sliding rheostat, the rap resistance wire and RPB resistance wire are connected in parallel, and then connected with R '

Math master, speed up! Come on!
A cube block with a surface area of 96 square decimeters is sawn into eight small cubes of equal volume. How many square decimeters is the surface area of each small cube block?
Thank you!!!!!!!!!!! I'm going to hand it in tomorrow!!!!!! very much!!!!!!

96/6=16
Side length = 4
Cuboid side length = 2
Surface area = 6 * 2 * 2 = 24 square decimeters