National exam board previous HSEB has published new exam routine for 2075BS for both students regular and partial. The exam results will be on a Grading system Grade 11 exam routine Grade 11 Exam routine : Grade 11 examination starts… Continue Reading
Unit 1: waves and optics Short Question answer Q.1 Differentiate between free and damped oscillation. Ans: The differences between free and damped oscillation are given below. Free oscillation Damped oscillation 1. The oscillation in the absence of external forces is… Continue Reading
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. Laser = Acronym for Light Amplification By Stimulated Emission of Radiation Characteristics of laser 1. It is monochromatic ie. having single… Continue Reading
Unit one (1) 1.1 Measurement and Dimensions 1 : physical Quantity :- Those physical Quantity which was some existence and measurable are known as physical quantity. Eg distanc, time , weight , velocity ,work etc Types of physical Quantity:- i>… Continue Reading
Grandmother – Ray Young Bear RAY YOUNG BEAR (1950). American-Indian poet and novelist. He was born in the Mesquaki tribe. His principal theme is the contemporary American-Indian’s search for identity. His major works are Waiting to be Fed (1975), Winter… Continue Reading
Theorem of Compound Probability (Multiplication Theorem) Statement If two events A and B are independent, then the probability of their simultaneous occurrence is equal to the product of their individual probabilities. Proof Let n1 and n2 the total number of possible cases… Continue Reading
Theorem of Total Probability (Addition Theorem) Statement If A and B are two events with their respective probabilities P(A) and P(B), then the probability of occurrence of at least one of these two events denoted by P(A∪B) is given by;… Continue Reading
Lamarcksim(Theory of inherent of acquired character) French naturalist J.B Lamarck proposed the theory of evolution in 1809 entitled Inheritance of acquired character through his “philosophic zoology book”. It is also known as Lamarckism. Lamarckism states that “An organism acquires… Continue Reading
Derivative of Trigonometric Functions d(sinx)/dx = cosx d(cosx)/dx = –sinx d(tanx)/dx = sec sq. x d(cotx)/dx = –cosec sq. x d(secx)/dx = secx.tanx d(cosecx)/dx = –cosecx.cotx Derivative of Hyperbolic Functions d(sinhx)/dx = coshx d(coshx)/dx = sinhx d(tanhx)/dx = sech sq. x d(cothx)/dx = –cosech sq. x d(sechx)/dx… Continue Reading
The common reactions(chemical properties) shown by chloroform are listed below. –)Air Oxidation:- When Chloroform is left on open air in presence of sunlight,it gets decomposed to Carbonyl Chloride. 2CHCL3 + O2 –Sunlight–> COCL2 + HCl -The so formed Carbonyl Chloride… Continue Reading