What does the word "like" mean

What does the word "like" mean

◎   such as  
【b ǐ rú】
(1)   [for example; for instance; such as]: indicates the following example; For example - the originator of an example
(2)   [if]: if
For example, if you want to go out, you must first settle down the housework
(3)   [that is]: Yes

How do you say it in English in class 7 of band 39

Class 7 Grade 39

7. The reservoir dam of Liujiaxia hydropower station is 147m high. When the reservoir water level is 130m, what is the pressure on the dam bottom? 8. A classmate with a mass of 45kg is standing on the horizontal ground. The contact area between each foot and the ground is 150cm2. What is his pressure on the ground? What can he do if he wants to double the pressure on the ground quickly? (g = 10 N / kg) 9. The pressure of a 5-ton crawler tractor on the horizontal ground is about 3 × 104 PA, what is the contact area between each track and the ground? (g = 10 N / kg)

7. P = water density xgh, so substitute the data p = 1.3x10 ^ 6pa
8.9 question 8 from P = f / S is 3000 pa... (2) it can pad up the heel and reduce half the stress area. 9. It is also substituted into P = f / s to get 0.83m2

Find a mixed problem of physics and Mathematics (that is, there is mathematics in physics and physics in Mathematics) I'm from junior high school

Whatever, you're in high school now? Or junior high school? In fact, just use a formula that involves mathematical discussion. For example, the Hooke coefficient K of the spring can be used as a function, that is, y = KX, X represents the length of extension or contraction of the spring, Y represents the elastic force, and K is the contraction coefficient, which can be used as a function
I've lost it for a long time. I can't say it completely. Forgive me

Why is mathematical knowledge helpful in solving physical problems

Mathematics is a subject that studies the concepts of quantity, structure, change and spatial model. Through the use of abstraction and logical reasoning, it is produced by counting, calculation, measurement and observation of object shape and motion. In the field of physics, it studies the basic components of the universe: matter, energy, space, time and their interactions; By analyzing the basic laws and rules to fully understand this system, the counting, calculation, measurement and quantitative help to the shape and motion of objects in mathematics!

What are the unsolved mathematical and biological problems in the world? It's the hardest. Who mentioned it

The unsolved mathematical problem in the world is "1 + 1 = 2"