সরাসরি প্রধান সামগ্রীতে চলে যান

Standard age to start menstrual cycle


Women menstrual cycle is an important part of discussion of women health. Women menstrual cycle is related with age. After a certain age girls menstrual cycle starts and after a certain age women menstrual cycle stops. It is also true that in different case for a different types factors the age limit of menstrual cycle may not obey. In some case it may take few time to start. Whatever, there have a certain age limit to start menstrual cycle. With the starting of menstrual cycle women behaviour and emotion also changes. The shapes of women body also started to change. There have a certain types of hormone that impacts on women menstrual cycle. With the development of age the level of such types of hormone production is variets in women body. In most of the case girls menstrual cycle starts at the age of 10 to 15.


sometimes certain types of food impacts on menstrual cycle to start in an effective time. Food impacts on menstrual cycle is noticeable.

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Popular Topics on Physics

 Following physics phenomena are considers as world most popular physics topics. Hawking Radiation Radiation from black hole. Black holes event Horizzon continuously radiates energy. Black Hole Region in universe from where nothing can escape. General theory of relativity It is a modified form of special theory of relativity introducing gravitation into it. Higgs Boson particles Recently discovered particles in universe. Quantum mechanics Quantum mechanics explain the behavior of motion particles in small scale.

Turkey Millitary operation In Northern Syrea

Turkey Millitary operation in Syrea

Internal rate of return

Internal rate of return is a discounted rate that makes NPV equal to zero. Internal rate of return simply define as IRR. IRR determines that if any project will be accept or reject. There have a certain condition on IRR that determines that the project will accept or not.  Let initial investment 100 dollar, after a one year expected to gain 130 dollar. NPV= Negative value of initial investment + FV/(1+r) = -100+130/(1+.08) Here, r is 8 percent =20.37 Here, NPV is greater than zero Project should accept. Again let us calculate IRR, IRR makes NPV is equal to zero. NPV = -100 + 130/(1+R) 0 = -100 + 130/(1+R) R = .30 30 percent Hence, R is greater than r Hence, project is accepted