Question

Все формулы за 8 класс

Answer 1

МОЛЕКУЛЯРНАЯ ФИЗИКА              
                       Q- количество теплоты           Дж
   Q=c m ( t2 – t1)
               c-удельная теплоемкость  Дж/кг С(нагревание)    
                 m-масса    кг                     
                 t1- начальная температура                      
                 t2-конечная температура
 Q=q m          
                q- удельная теплота сгорания Дж/кг  (сгорание)
 Q=

Answer 2

Formulas for 8th Grade

Here are some formulas commonly used in 8th grade mathematics:

1. Distance, Speed, and Time Formula: - The formula for calculating distance is: `distance = speed × time`. - The formula for calculating time is: `time = distance / speed`. - The formula for calculating speed is: `speed = distance / time`.

2. Quadratic Formula: - The quadratic formula is used to find the solutions (roots) of a quadratic equation: `x = (-b ± √(b^2 - 4ac)) / (2a)`. - In the quadratic equation `ax^2 + bx + c = 0`, `a`, `b`, and `c` are coefficients.

3. Slope-Intercept Form: - The slope-intercept form of a linear equation is: `y = mx + b`, where `m` is the slope and `b` is the y-intercept.

4. Pythagorean Theorem: - The Pythagorean theorem is used to find the length of the sides of a right triangle: `a^2 + b^2 = c^2`. - In a right triangle, `a` and `b` are the lengths of the two legs, and `c` is the length of the hypotenuse.

5. Volume Formulas: - The formula for the volume of a rectangular prism is: `V = l × w × h`, where `l` is the length, `w` is the width, and `h` is the height. - The formula for the volume of a cylinder is: `V = πr^2h`, where `r` is the radius and `h` is the height. - The formula for the volume of a cone is: `V = (1/3)πr^2h`, where `r` is the radius and `h` is the height.

6. Area Formulas: - The formula for the area of a rectangle is: `A = l × w`, where `l` is the length and `w` is the width. - The formula for the area of a triangle is: `A = (1/2)bh`, where `b` is the base and `h` is the height. - The formula for the area of a circle is: `A = πr^2`, where `r` is the radius.

These are just a few examples of formulas used in 8th grade mathematics. There are many more concepts and formulas to explore in this subject.