What are the physical formulas of senior one

What are the physical formulas of senior one

It's better for you to summarize and sort it out by yourself. It's meaningless to take other people's things,
Physics is different from liberal arts. To remember is to learn,
When you organize your knowledge, you may find some rules and problems that you didn't notice before,
If you solve these problems, your physics study will take a big step forward

All the formulas of physics electricity in Junior Three
Junior high school physics on all the formulas of electricity, including deformation, as well as the unit and name of each physical quantity

1. The current and voltage of series circuit have the following rules: (e.g. R1, R2 in series) ① current: I = I1 = I2 (the current in each part of the series circuit is equal) ② voltage: u = U1 + U2 (the total voltage is equal to the sum of the voltages in each part) ③ resistance: r = R1 + R2 (the total resistance is equal to the sum of the resistances)

All the formulas of physics and electricity in junior three!
be-all

1. I = u / R (Ohm's Law: the current in a conductor is directly proportional to the voltage at both ends of the conductor and inversely proportional to the resistance of the conductor) 2. I = I1 = I2 = =U = U1 + U2 + +Characteristics of voltage in series circuit: in series circuit, the total voltage is equal to that of each part

What's the difference when you subtract 0.72 from the quotient of 51 divided by 4.8?

51÷4.8-0.72
=10.625-0.72
=9.905

What's 29 out of 72 plus 7 out of 12?
Quick answer!
Answer in three minutes

29 out of 72 plus 7 out of 12
=29/72+42/72
=71/72

Xiao Ming read a story book. He planned to read 12 pages a day, but actually read 8 more pages a day. As a result, he finished it two days in advance. How many pages does the story book have?

A: this story book has 60 pages

Solve the equation 6x-3 [3-2x] = 6 - [x + 2] [2] 3Y of 4 + 12 = 5Y of 2-3-7

6x-3[3-2x]=6-[x+2]
6x-3*3+3*2x=6-x-2
12x-9=4-x
13x=13
x=1
【2】 3Y / 4 + 12 = 5Y / 2-3-7
Take 12 on both sides
3(3y+12)=24-4(5y-7)
9y+36=24-20y+28
29y=16
y=16/29

Divide the 2-meter-long rope into 5 sections, each section is a fraction of the total length, and 1-meter is a fraction of the total length

Each section is 1 / 5 of the total length, and 1 meter is 1 / 2 of the total length

Let f (x + 1) = x ^ 2 + 2x + 3. Find the value of F (2)

f(2) = f(1+1) = 1^2 + 2*1 + 3 = 6

① The number of students in class (1) and class (2) of Grade 7 is the same. The total number of students in the two classes reaching the standard in the physical examination is 60. It is known that (1) the class reaching the standard rate is 75%, and (2) the class reaching the standard rate is 50%
② The construction site needs to prepare 36 tons of one kind of concrete, and the mass ratio of cement, sand, stone and water is 1:3:10:4. How many tons of each of the above four raw materials need to be prepared?
③ In the first stage, 1 / 2 of the total length of the dam was built, and in the second stage, 1 / 3 of the remaining part was built. There is still a 40 meter long dam that has not been built. How many meters is the total length of the dam?
In addition, I just put forward the questions first, and then I'll get the answers after I finish, so please help me. Let's see what I'm best at matchmaking

1. Set the number of people in one class as XX * 75% = 60, x = 80, 2 classes as YX * 50% = 60, y = 120, 1 class as 80, 2 classes as 120, 2. Set the four kinds of raw materials as X tons, 3x tons, 10x tons, 4x tons, x + 3x + 10x + 4x = 36x = 23 * 2 = 6, 10 * 2 = 20, 4 * 2 = 8, cement, sand, stone and water as 2, 6, 10 and 8 tons respectively, 3. Set the total length as xx-x / 2 - (...)