All formulas of physical mechanical efficiency Full point of

=W have / W total = GH / Fs = g matter / g matter + G movement

And then the representative meaning of the letter, there is under what circumstances

Current: I (a) voltage: u (V) resistance: R (Ω) in series circuit: current: I = I1 = I2 I is the total current I1 I2 is the current voltage of each part: u = U1 + U2 u is the total voltage U1 U2 is the voltage of each part in parallel circuit: current: I = I1 + I2 voltage: u = U1 = U2 in series circuit: the total current is equal to

So the formula of the first 2 physics requires that the meaning represented by two characters and literal and alphabetic have!

Because you are talking about the second day of junior high school. So I only summarize the second day of junior high school. Let me tell you the meaning of each character. Name symbol unit symbol pressure P Pascal PA depth h volume V cubic meter m time T seconds s

The expression of echo ranging: S =

S=vt

RELATED INFORMATIONS

1. What is the physical formula of echo ranging? 3Q
2. Who can write the formula of measuring echo distance
3. Braking distance and reaction distance of physical vehicle in grade one of senior high school Need a detailed problem-solving process and analysis of the problem ideas [don't be too complicated, people can't understand it] In order to be safe, cars are on the way, between cars Speed response distance braking distance 10 12 20 15 18 x 20 y 80 25 30 125 A certain distance must be kept because it is seen from the driver In the reaction time from a certain situation to braking action, the car There is still a distance to pass, which is called reaction distance From taking the brake action to stopping the car moving through The distance is called braking distance. The table shows the braking distance at different speeds Part of the data of reaction distance and braking distance are calculated according to the analysis The data X and y not given in the table should be
4. △x=aT^2 Can △ X in this formula be the separation distance? What time does t mean For example, in a uniformly accelerated linear motion, The distance between 1s and 2S is x1, and the distance between 4S and 5S is x2 So what's the difference between △ X and t? According to the answers Can't we use this formula to solve this problem? Are 1s-2s and 4s-5s discontinuous time intervals?
5. How to express time, distance and speed?
6. What letter does quantity use in Physics (and give an example) please help me
7. What letter does physical pressure use On the problem of physical drawing
8. What is the calculation formula of instantaneous velocity
9. The expression of instantaneous velocity
10. Formula, conversion and unit conversion of primary school mathematics ditto.
11. Today's biological experiment test, the determination of energy in a certain food, the teacher gave the formula is T1 =? T2 =? Q = 4.2 × m (t2-t1) =? Q = 4.2 × m (t2-t1) =? What do you mean? Is this a complete public announcement?
12. What is the heat calculation formula? For a room 2.5 meters long, 2 meters high and 3.5 meters wide with a temperature difference of 83 ℃, how to calculate the heat consumption?
13. What do the letters of q = cm △ t stand for?
14. Junior high school physics formula
15. All the formulas of physics, electricity and mechanics in junior high school?
16. And how to apply all the formulas!
17. Several problems of complete square formula in Mathematics The second power of X + 4Y + () = the second power of (x-2y) The second power of (a + b) - (a-b) The second power of (a-b) = the second power of (a + b) + () The second power of (4m + ()) = the second power of 16m - 4m + () The second power of () is the second power of M + 8m + 16 The second power of (- 5y-2x) = () The second power of (a + 2b) + () = the second power of a + the second power of 2Ab + the second power of 4B If x to the second power + 2x = 1, then (x + 1) to the second power = ()
18. A question about the complete square formula on the second day of junior high school is going to be urgent tonight Given (2006-a) (2004-A) = 2005, find the value of (2006-a) & sup2; + (2004-A) & sup2
19. Power formula of pure resistance circuit and non pure resistance circuit
20. The relationship between electric heating and electric power: electric heater: q = W. other electrical appliances: Q () w to protect the safety of equipment, prevent excessive current, prevent short circuit, To prevent poor contact, what else to prevent