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Father of a rocket Father of B hybrid rice 2 Benz (Germany) Father of C train 3 bullying Stephen sun (UK) Father of D automobile 4 Yuan Longping (China) The father of e mechanics
A5
B4
C3
D2
E1
Chinese connection question 1
Look at the earth
Gaze into the distance
Look around
Looking out of the window
Gaze out of the window, gaze into the distance, look around, look down on the earth
People's education press sixth grade volume II Chinese book contents
Don't take the first lesson of the new curriculum standard. It's about plum blossoms and two pieces of classical Chinese
-2 (2x & # 178; y-2xy & # 178;) - [(- 3x & # 178; Y & # 178; + 3x & # 178; y) + (3 & # 178; Y & # 178; - 2XY & # 178;)], where x = - 1, y = 2
Because x = - 1, y = 2
-2（2x²y-2xy²）-[(-3x²y²+3x²y)+(3x²y²-2xy²)]
=-4x²y+4xy²-(3x²y-2xy²)
=-4x²y+4xy²-3x²y+2xy²
=-7x²y+6xy²
=xy(-7x+6y)
=-1*2*(7+12)
=-38
How many kilowatt hours does a 1600 watt heater use
1.6 degrees
Degree = kWh
A company has 10 employees, each of whom has an annual salary of 50000 yuan. Due to the continuous expansion of business, it plans to increase the annual salary of employees by 10% from this year. At the same time, three new employees are recruited every year, and the annual salary of each new employee is 40000 yuan in the first year, The annual salary of the next year will be increased by the same percentage as that of the original employees of the company. What will be the total salary of the company in the nth year?
This is a series of equal ratio + equal difference, 1.10 * 52.10 * 5 * (1 + 10%) + 3 * 43.2 years * (1 + 10%) + 3 * 44.3 years * (1 + 10%) + 3 * 4... N = (n-1) years * (1 + 10%) + 3 * 4 construct a series of equal ratio (an-120) / (an-1) = 1.1, so the total wage of the nth year an-120 = 12 * 1.1 ^ (n-1) move 120 to the past
When a "220 V, 100 W" electric fan, a "220 V, 100 W" TV and a "220 V, 100 W" electric blanket work normally, which electric appliance consumes the most electric energy in the same time? Which appliance produces the most heat and why?
∵ u = 220 V, ∵ the actual power of the three kinds of electrical appliances: P = P = 100 W; and ∵ w = Pt ∵ the electric energy consumed by the three kinds of electrical appliances is the same; ∵ the motor in the electric fan converts most of the electric energy into mechanical energy, the television converts part of the electric energy into light energy, and the electric blanket converts all the electric energy into internal energy As much electricity is consumed, the electric blanket produces the most heat
Simple operation: 1 / 3 * 4.5 / (0.75 + 5 / 4)
1/3*4.5/(0.75+5/4)
=1/3*4.5/(3/4+5/4)
=1/3*4.5/2
=1/3*3*1.5/2
=1.5/2
=(3/2)/2
=3/2*1/2
=3/4
The armature resistance of a "6V15W" DC motor is 0.5 ohm. When it is connected to the power supply with electromotive force E = 6V and resistance R = 0.5 ohm, two motors are measured
When working, the voltage at both ends of the motor is always 5V
Total power of power supply P = u ^ 2 / (R + R) = 6 ^ 2 / (0.5 + 0.5) = 36
The total power of the power supply is 36 watts
Simple calculation of 5 / 36 × 37 + 31 / 36
5/36×37+31/36
=5/36×(36+1)+31/36
=5/36*36+5/36+31/36
=5+(5/36+31/36)
=5+1
=6
RELATED INFORMATIONS
- 1. Please give me the catalogue of the sixth grade Chinese books,
- 2. Sixth grade volume I Chinese textbook (2008) people's education press lesson 1 What's the requirement Send it to me
- 3. Good words, good sentences, 20 good words and 2 good sentences in the fifth lesson of the sixth grade Chinese book of people's Education Press
- 4. The abbreviation of Cowherd and weaver girl is about 150 words
- 5. Why do astronauts in space sigh that "our earth is too lovely, but it's too easy to break at the same time?"
- 6. Who knows the contents of pages 489 to 498 in the first volume of seventh grade Chinese self reading textbook Just tell me the name of the subject. The book belongs to pep
- 7. What is the text on page 20 of PEP seventh grade volume I Chinese self reading textbook?
- 8. What's the meaning of the dash in Chinese Lesson 19 in Volume 1 of grade 6
- 9. What is the text of Lesson 19 in the fifth grade volume I of PEP? In five minutes, I forgot to bring my Chinese book with me
- 10. How to group the new words in the back of Lesson 9 in the first volume of the sixth grade Chinese book
- 11. In the field, the sun comes out For example: on the sea, the sun jumps out. On the grassland, the sun comes out. In the forest, the sun is sung by the birds. In the mountain village, the sun comes out. In the city, the sun comes out. In the field, the sun comes out.
- 12. Primary school first grade summer homework Chinese one question seeks the answer spray Where is the home of surf? Home in the sea When will the waves bloom? Please ask the wind Why are you so blue? I hold the sky in my arms Why are you so salty? Because the fishermen are sweating 1. The home of spray is in () 2. The first "you" refers to (), the second and third "you" refers to (), and "I" refers to ()
- 13. So I feel inferior This is a new word. A word and a radical can only be used once You're in October The door to the horse inch north also day
- 14. On the first grade Chinese topic of primary school: The sheep crawled and crawled. It was tired and couldn't move. It thought: I'm not afraid of being tired. How high the mountain is, how high I climb! How many sentences? Who can help me, please? But see the textbook, the teacher's decomposition of other sentences is to a comma, so I am very confused.
- 15. Is spring Ding Dong wrong? It should be spring Ding Dong
- 16. Primary school first grade Chinese first volume synchronous exercise book class hour practice answer
- 17. There are 20 peaches in one basket. They are divided among four children, five for each. There are five left in the basket. What's the matter? (it will be added if it's OK)
- 18. After Mr. Li transferred one girl from the math interest group to the English interest group, 17 of the remaining students were girls. If two boys were transferred instead of the girl, 15 of the remaining students were girls. Q: how many students were there in the math interest group?
- 19. Mr. Li took some money to buy popular science books for the children in the welfare home. With this money, you can buy 30 copies of "exploring nature" and 100, 000 books You can buy 20 copies of "what". If you have a set of "nature exploration" and a set of "100000 whats", how many sets can you buy with your money?
- 20. Don't leave your English books at home