Find the fulcrum first, then the point of force, and finally the point of resistance.
-
:baike.baidu./view/85065.htm？ fr=ala0_ 1_ 1
-
The difference between unequal arm lever and equal arm lever (for example, let the left arm be left and the right arm be right). If the mass of the measured object is set to m, it is "when the left object and the right code are in equilibrium"; if there is M*L left = m * L right, it is "when the position and weight of the object are in equilibrium"; if there is n*L left = m * L right, it is divided by the above two formulas, and M/n=m/M/.
How to draw a php class diagram, who will give an example to find out the entity, the so-called PHP website and the core block first? Then analyze the function of each module separately. UML mainly analyzes the sequence diagram of function completion, such as the process of user login. Then we will use the timing diagram of UML modeling. Or use the module when analyzing other functional modules.
How to draw a mind map? Like what? Draw from the center of the white paper and express your central theme with images. Draw branches, different branches use different colors, and use curves instead of straight lines. Write keywords in each line, not the whole paragraph. Using graphics from beginning to end, mind maps are visual.
What is a leveraged fund? Give an example to illustrate how to operate. Thank you. Leveraged fund is a special kind of fund. It exists in pairs (or in groups of three). One of them is very safe and has a guaranteed income. The other is very radical (this can be called leveraged fund). If you lose money, you must use your own money to fill the loopholes in another security fund (to ensure his guaranteed income), so the loss will be amplified; On the contrary, the capital preservation fund still only takes the prescribed profits, and the rest of the profits are all piled on this leveraged fund. Because he will enlarge when he loses money and makes money, just like leverage, he is called a leveraged fund.
The trading of leveraged funds is the same as that of stocks. Each fund has its own code. As long as it has a stock account, it can be bought and sold like a stock. However, due to leverage, its ups and downs are worse than stocks.
Can you give an example, the calculation of the force on the fulcrum of the lever? When a man lifts two heavy objects, 300 cows and 500 cows, with a pole without gravity, the pressure on his shoulder is 800 cows.
For example, teach me how to know which oxidant. Reduction reactions, such as the combustion of hydrogen, are essentially reactions between oxygen and hydrogen. Oxygen is reduced from zero valence to negative valence (in the process of reaction, the valence state of oxygen is reduced by oxidant), that is, oxygen is oxidant. Relatively speaking, hydrogen has been increased from the original heap price to the positive unit price, and the valence of hydrogen has been increased by reducing agent.
What do you mean by painting the tiger as rotten? For example, it is nonsense to paint a tiger as rotten. For example, I'll treat you to dinner tomorrow.
Give five examples of labor-saving lever and labor-saving lever. The force arm of the labor-saving lever is greater than the resistance arm, and the force is less than the resistance when balancing. With less strength, more resistance can be overcome.
Example: bottle opener, juicer, wrench, moving pulley, nutcracker.
The power point is in the middle, and the power arm is smaller than the resistance arm, which is a laborious lever.
Examples: tweezers, fishing rods, hair scissors, chopsticks, pliers and paddles.
What is psychological portrayal? Like what? Psychological description is psychological description.
Psychological description is to describe the inner thoughts and emotional activities of characters. Describing a character's ideological activities can reflect his character and express his inner world. Therefore, psychological description is also one of the important means to describe characters' thoughts and personalities.
Through the description of the characters' psychology, we can directly go deep into the characters' hearts, reveal their inner world and express their rich and complicated thoughts and feelings.
There are many ways for the author to create characters, all of which are to express the spiritual world and personality characteristics of the characters. So is the purpose of psychological description. Compared with portrait description and language description, psychological description can directly describe the secular desires of the characters, reveal the mysteries in the souls of the characters, reveal the inner feelings that are difficult to express only by external images, and make the characters in literary works three-dimensional, thus appearing more complete and true.
Mo Bosang used psychoanalysis in his novel The Necklace. He used "she always wants to be liked, admired and pursued by others" to express Mathilde's dream of getting rid of the shabby, dim and mediocre life, becoming a well-off and flattered aristocratic lady. Through "she is more intoxicated with her beauty than all the female guests", she shows that she is consciously beautiful and confident to jump out of the mediocre family and climb into the upper class.
"Ah Q was defeated in form. He was caught by the yellow braid and touched four or five heads on the wall. Until then, the idle people left with satisfaction. Ah Q stood for a while and thought,' I was finally beaten by my son, and the world is really disgraceful now …' So he left with satisfaction. "
-Lu Xun's The True Story of Ah Q
Although the above spiritual description is very concise, it well reveals the character characteristics of the characters and activates Ah Q's spiritual victory method.