Ls

why cant metal be used in braggs law(electrons interference?)?

Stationary wave confusion?

Find the maximum value of (1+cosx)sinx?

Show that 1-1/2t^2<=cost<=1 for 0<=t<=1.?

(c)^(ba)=1679616 find a+bxc?

Why wont the water wave undergo a phase change of pi when propagate to a fixed wall.?

Electrostatic confused concept?

Circuit question!!?

CUHK enrichment stream in theoretical physics vs oxford physics?

Circuit and potential difference?

Electric potential energy please help?

Van de Graff generator?

Magnetism question plz help?

Question about solenoid.(concept)?

Voltage and charge question?

Electrostatic concept plz help?

plane geometry,plz teach me?

strange magnetic flux question?

wave motion problem,plz help?

electromagnetic concept plz help confused?

electromagnetic induction I don't understand?

maths finding approximate value?

math question?

math integration?

plz help circle problem?

plz help me again(phy) follow up?

please teach me how to prove (phy)?

two electrostatic questions, plz help, I'm so confused?

wave question phy plz help?

find 1/4029 + 2x2014/(2014^2+2015^2) + 4x(2014)^3/(2014^4+2015^4) - 8x(2014)^7/(2014^8-2015^8)?

Let x be a real number. Find the minimum value of root(x^2-4x+13)+root(x^2-14x+130).?

find the sum of all real roots to the equation (x-1)^(1/2) + (13-x)^(1/4) = 2[(3)^(1/2)] ans:17, plz explain?

in how many different ways can two integers x and y (where x>y) be chosen from 1 to 30 (包括首尾兩數) such that the hcf of x+y and x-y is 1?

if positive integers m and n satisfy 23/50<m/n<64/139,find the smallest possible value of n. ans:63, plz explain?

if the last three digits of the square of a positive integer are the same and nonzero,we say that the positive integer is good. for example,?

Let x,y,z be real numbers such that (x-15)^2+(y-20)^2 smaller or equals to49 and 10y=zx. Find the greatest possible value of z.?

find the valueof (99^3+100^3)/(1^3+100^3)+(97^3+99^3)/(2^3+99^3)+(95^3+98^3)/(3^3+98^3)+...+1^3+51^3)/(50^3+51^3)?

A question about double-slit experiment with cover.?

standing wave的問題?

escape velocity

question of maths and phy

physics mc plz help

貝澳營地營位一問

physics motion

help coriolis effect

floor and ceiling function

internal energy

Foucault pendulum

A maths symbol

free falling