What does the symbol "Phi" stand for?

Greek letter, Chinese name Fei, pronunciation phi (FAI). In physics, it is used to express magnetic flux. The small form is φ. In the function y = asin (ω x + φ), it means the size of translation from left to right. In engineering, φ means the diameter of cylindrical material equipment. In physics, the focal length is used to express the degree of glasses = 1 / φ Φ phi (upper case Φ, lower case

RELATED INFORMATIONS

1. Conversion relationship between capacitor capacity units
2. The image process of function y = - 2x + 4___________ Quadrant, which is surrounded by two coordinate axes, and the circumference of the triangle is_______
3. 1. School bought 10 cases of chalk, a box of 60 boxes, an average of 12 classes, each class points how many boxes 2. There is a packet of candy, no matter it is divided to two or five people, there is exactly one piece left. If it is divided to three people on average, it is just finished. How many pieces of candy is there in this packet at least? 3. There is a 30 meter long rope. From one end, make a mark every 2 meters, and make a mark every 3 meters. Then cut it along the place marked with a common mark. How many sections has the rope been cut into?
4. SN is the sum of the first n terms of the arithmetic sequence, S4 = 26, sn-4 = 77, Sn = 187, find n
5. Xiaomin and Xiaogang are both stamp collectors. Now the ratio of the number of stamps of Xiaomin and Xiaogang is 3:4. If Xiaogang gives Xiaomin nine stamps, then the number of stamps of the two of them is equal. How many stamps do they have in total?
6. Given that the numbers corresponding to a and B on the number axis are - 2 and 4 respectively, P is a moving point on the X number axis, and the corresponding number is X. Q: point a and point P (at the origin) After moving to the right for a few minutes, P is the midpoint of ab
7. Rational number calculation process 10-(-5)+(-9)-(+3)+(-7)
8. To celebrate the "June 1st" International Children's day, a primary school in Jiguan District organized a total of 360 teachers and students to participate in the park activities. There are two types of buses a and B available for rent. The carrying capacity of the two types of buses is 45 and 30 respectively. It is required that each bus must be fully loaded, so the rental scheme for all teachers and students to arrive at the park at one time is () A. Three species B. four species C. five species D. six species
9. I'd like to ask you a question: 540 cases of apples are transported by three trucks. How many cases of apples are transported by each truck on average (solved by equation)
10. A number is a factor of 72, a multiple of 8. What's the number
11. Calculation with recursive equation 1.224466×446688÷(112233×223344)
12. (240 + 36 + 42) △ 7 how easy to calculate (recursive equation)
13. Simple calculation: 13.6 * 36 + 136 * 6
14. 26 * 136-36 simple calculation
15. Calculate the following questions as easily as possible 88x99 = = = =
16. Recursive equation calculation 2.7×4.3+27×0.48+0.27×8
17. Recursive equation calculation Seven and seven tenths × one and five ninths + 2.3 △ () (fill in the number that is not 1 or 0)
18. How to simplify and how to calculate 2.8×13+3.6×4.5 = = 23.4÷7.8×2.1 = =
19. Calculate the following questions, so how to do it easily 48×69+48×31 26×45÷（85-46） 125.3-27.44-12.56 7200÷25÷4 2.95+23.47+5.05+6.53 0.25×32×12.5
20. More simple point, because you have to copy the question, the question is shorter, no answer is OK It's not a test paper. It's a practical problem