Recent content by m.medhat

Homework Statement hello , if f(x) is a function which satisfies the mean value theorem , where :- f(x) = \left\{ {\begin{array}{*{20}c} {2x^3 - x + 1\quad \quad x \in [0,1]} \\ {3x^2 - x\quad \quad \quad x \in (1,3]} \\ \end{array}} \right. find the value of (c) by using the...

i think that you write some formulas wrong (you have mistake in writing) .

thanks , when you said :- " are all either 1 or -1" , i understand . very thanks

Homework Statement Hello …….. I have a question about a statement mentioned in the book “Introduction to tensor calculus and continuum mechanics” . it is :- Where the space (Vn) is Riemann space . Is this statement really true ? Homework Equations The Attempt at a...

i understand the idea , thank you veryyyyyyyy much .

let (1-[v^2]/[c^2])^-1/2 = y therefore ?:- V = y (v,ic) V^2 = (y^2) ([v^2] + [ic]^2) then V^2 = [y^2] ([v^2]-c^2) that's all. i still need help , please .

i do that but i don't obtain the result (-c^2) i still need help .

Homework Statement Hello , I have the book (An introduction to tensor calculus , relativity and cosmology) , this book defined the 4-velocity vector as :- And this book stated that :- How could we obtain (17.4) from (15.6) ? Please I need help . Thanks …….. Homework...

of course it differs

Please I have another thing here , my book states that :- “ This line intersects the particle's original locus of simultaneity at the point (x,0) “ I can’t understand this statement , please I want someone to explain and prove this statement for me . I need help please .

very thanks .

Homework Statement Hello , I have a question please , I read in the book ( reflections on relativity ) that :- Suppose a particle accelerates in such a way that it is subjected to a constant proper acceleration a0 for some period of time. The proper acceleration of a particle is defined...

then this means that the body moving with a uniform circular motion is not in equilibrium , isn't it ? many thanks for answer .

i know that a body in equilibrium , the net force acting on it must be zero . but for the body in uniform circular motion , there is a force acting on it , it is the centripetal force , and the net force here -as i think- not equal zero but equal to centripetal force . i still need help please .

Homework Statement if a body is in a uniform circular motion . is it in equilibrium? Homework Equations The Attempt at a Solution i think it is not in equilibrium ... please i want the true solution .