Mathematical problem equation solution 1. A factory has accepted the processing of a batch of parts, which is expected to be completed in 30 days according to the original quota of each day. Now, the work efficiency is 50% higher than the original. As a result, it is completed 8 days earlier, and 24 more parts are processed. So, what is the original processing task? What is the original quota of daily processing? 2. A and B vehicles run from ab at the same time. The meeting point of the two vehicles is 8km away from the midpoint of ab. it is known that the speed of a vehicle is 1.2 times of the speed of the existing vehicle, so the distance of AB is calculated

Mathematical problem equation solution 1. A factory has accepted the processing of a batch of parts, which is expected to be completed in 30 days according to the original quota of each day. Now, the work efficiency is 50% higher than the original. As a result, it is completed 8 days earlier, and 24 more parts are processed. So, what is the original processing task? What is the original quota of daily processing? 2. A and B vehicles run from ab at the same time. The meeting point of the two vehicles is 8km away from the midpoint of ab. it is known that the speed of a vehicle is 1.2 times of the speed of the existing vehicle, so the distance of AB is calculated

1. A factory has accepted the processing of a batch of parts. According to the original quota of each day, it is estimated that it can be completed in 30 days. Now, the work efficiency is 50% higher than that of the original. As a result, it is completed 8 days ahead of schedule, and 24 more parts are processed

In a football match, it is stipulated that: 3 points for winning a game, 1 point for drawing a game, and 0 point for losing a game. In the 2013 Asian Champions League group match, Guangzhou Hengda team won 3 times of the number of negative games, and 2 times of the number of negative games for drawing a game. With 11 points, Guangzhou Hengda team qualified as the first in the group?

Let X be a negative field, then 2x is a flat field and 3x is a winning field
3*3x+2x+0=11
The solution is x = 1
Then 3x = 3
A: Guangzhou Hengda won three games in the group match

There are two bulbs in series in the circuit. The voltage at both ends of the circuit is 10V. The resistance of bulb L1 is 2 ohm and that of bulb L2 is 3 ohm
What is the current through L1____ The current through L2 is, and the voltage at both ends is______ What is the voltage across L2_____

It's better to teach people fish than to teach people fish. You are just learning circuit problems, as long as you understand the relationship between resistance and current in series circuit
In a series circuit, the total resistance is equal to the sum of the resistances
In a series circuit, the current is equal everywhere
Then use Ohm's law I = u / R to calculate

52X & # 178; * (9-4) = 65 to solve the equation

52x²*(9-4)=65
52x²=65/5
13×4x²=13
4x²=1
x=±1/2

Is the resistance determined by the conductor itself

Not exactly, the resistance of the object r = ρ L / s
In the above formula,
R is the resistance value commonly used in Ω
ρ is resistivity, commonly used in Ω· M
S is the cross-sectional area, commonly used in M2
L is the length of the conductor - commonly used unit: M
These are the factors of the object itself,
The resistivity of some objects increases with the increase of temperature, such as electrolyte;
The resistivity of some objects decreases with the increase of temperature, such as metal materials;
Some are almost not affected by temperature, such as manganese copper alloy, nickel copper alloy
That is to say, the earth resistance of the object is also related to the temperature. This is the external factor

1. My father is 32 years old and my son is 5 years old. Q: how many years later will your father be four times as old as your son?
2. The sum of the ages of father and daughter is 91. When the father's age is twice the daughter's present age, the daughter's age is 1 / 3 of the father's present age
……………

1. After X years
（32+X）÷（5+X）=4
X=4
2. If the daughter's present age is x, then the father's present age is (91-x)
2X=（91-X）×1/3
X=13

How many minutes is 1 kilowatt hour for an electrical appliance with a power of 1500W?

It should be 45 minutes

(a²-6)²-6(a²-6)+9=

(a²-6)²-6(a²-6)+9=（a²-6-3）²=（a²-9）²=（a-3）²（a+3）²

How does the electricity in the battery come into being

MnO2, NH4Cl and other substances react, resulting in potential difference (potential), which generates current in the circuit
After the chemical reaction, the useful components are less and less, the potential difference disappears, and there is no electricity
The same goes for fruit batteries

Simple calculation of 4 / 3 + 7 / 12-9 / 20 + 11 / 30-13 / 42

4/3+7/12-9/20+11/30-13/42
=1+1/3+11/30-9/20+7/12-13/42
=1+7/10-9/20+7/12-13/42
=1+1/4+7/12-13/42
=1+5/6-13/42
=32/21