In Bernoulli test, the probability of success of each test is p In Bernoulli test, the probability of success of each test is p, and the average number of tests is calculated until both success and failure occur

In Bernoulli test, the probability of success of each test is p In Bernoulli test, the probability of success of each test is p, and the average number of tests is calculated until both success and failure occur

When the test stopped, the number of tests was x, P (x = 2) = (1-p) * P + p * (1-p) = 2 * p * (1-p) P (x = 3) = (1-p) ^ 2 * P + P ^ 2 * (1-p) = ((1-p) + P) * p * (1-p) P (x = 4) = (1-p) ^ 3 * P + P ^ 3 * (1-p) = ((1-p) ^ 2 + P ^ 2) * p * (1-p) P(x=n)= (1-p)^(n-1)*p+p^(n-...

How to calculate the Lorentz force?
RT

f=qvb

Seeking 50 oral arithmetic problems in the first volume of the fifth grade
Urgent···

56÷14 =4
65÷13 = 5
75÷15 = 5
120÷24 =5
200÷25 = 8
800÷16 = 50
840÷21 =40
560÷14 = 40
390÷13 = 30
600÷15 =40
72÷24 = 3
85÷17 = 5
90÷15 =6
96÷16 = 6
78÷26 = 4
51÷17 =3
80÷40 = 2
100÷20 = 5
100÷4 =25
240÷40 = 6
920÷4 = 230
300÷60=5
64÷2 = 32
64÷4 = 16
50÷5 =10
60÷4 = 15
96÷4 = 24
90÷6 =15
400+80 = 480
400-80 = 320
40×80 =3200
400÷80 = 5
48÷16 = 3
84.96÷24 =4
85.160×5= 800
86.4×250= 1000
87.0×518= 0
88.10×76= 760
89.36×10=360
15×6= 90
24×3= 72
5×18= 90
26×4= 74
7×15=105
32×30= 960
40×15= 600
60×12= 720
23×30= 690
30×50=1500
5×700=350

Lorentz force formula

f＝qvB
q. When V is not perpendicular to B, the Lorentz force is f = q vbsin θ, where θ is the angle between V and B
The integral form of the equation is f = ∫ V (PE + J × b) Dr
The direction follows the left-hand rule

20 oral arithmetic questions for fifth grade students

17×40＝680,100－63＝37,3.2＋1.68＝4.88,2.8×0.4＝ 1.12
14－7.4＝6.6,1.92÷0.04＝48,0.32×500＝160,0.65＋4.35＝ 5
10－5.4＝4.6,4÷20＝0.2,3.5×200＝700,1.5－0.06＝1.44
0.75÷15＝0.05,0.4×0.8＝0.32,4×0.25＝1,0.36＋1.54＝2
1.01×99＝99.99,420÷35＝12,25×12＝300,135÷0.5＝270
3/4 + 1/4 =1,2 + 4/9 =22/9,3 - 2/3 =7/3,3/4 - 1/2= 1/4
1/6 + 1/2 -1/6 =1/2,7.5-(2.5+3.8)=1.2,7/8 + 3/8 =5/4
3/10 +1/5 =1/2,4/5 - 7/10 =1/10,2 - 1/6 -1/3 =1.5
0.51÷17＝0.03,32.8＋19＝51.8,5.2÷1.3＝4,1.6×0.4＝ 0.64
4.9×0.7＝3.43,1÷5＝0.2,6÷12＝0.5,0.87－0.49＝0.38
123+25=148 123-35=88 56×7=392 135÷5=27

Solving Lorentz force formula
Such as the title

f＝qvB
q. When V is not perpendicular to B, the Lorentz force is f = q vbsin θ, where θ is the angle between V and B
The integral form of the equation is f = ∫ V (PE + J × b) Dr
The direction follows the left-hand rule

300 oral arithmetic problems in grade five

　　4.5*6＝?　　6-4.05＝?　　8.4÷0.7＝?　　3.67+6.13＝?　　0.5*1.2＝?　　0.55÷1.1＝?　　5.42+7.5*1.6＝?　　0.25*1.7*0.4＝?　　7.86-4015-2.85＝?　　0.125*32*2.5＝?　　6.4×0.2+3.6×0.2＝ 6.25×8＝　...

Vector problem of relativistic Lorentz transformation
The velocity to be directed is v = (VA + VB) / (1 + vavb / C ^ 2), so what is the velocity to be directed? Or is my formula confused?

If the direction is opposite, just add a minus sign in front of one of them

Xiaohua can do 35 oral arithmetic in one minute. Xiaojun's speed is 1.4 times that of him. How many oral arithmetic can Xiaojun do in one minute

35×1.4=44

Relativity is derived by Lorentz transformation. Can we use other transformations to deduce relativity?

There are only two basic hypotheses in the theory of relativity. If the hypotheses are satisfied, we can deduce that there is a Lorentz transformation relationship between physical quantities in different reference frames. The theory of relativity is not derived with Lorentz transformation, Lorentz guessed this transformation artificially. Relativity can deduce this transformation from hypothesis through mathematics. So there will be no other transformation that conforms to relativity hypothesis