sad

4. Structure of the Atom I. For question numbers 1 to 8, two statements are given-one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer to these questions from the codes (a). (b), (c) and (d) as given below :   (a) Both A and R are true and R is the correct explanation of the assertion. (b) Both A and R are true butRis not the correct explanation of the assertion.   (c) A is true but R is false.   (d) A Is false but R is true. (1 Mark) 1. Assertion (A) : Electrons, protons and neutral particles (neutrons) in an atom are called 'sub-atomic particles'. Reason (R) : According to John Dalton's atomic theory, an atom can be further subdivided into three fundamental 'sub-atomic partides'. 2. Assertion (A) : JJ. Thomson explained presence of electrons by cathode rays experiment. Reason (R) : Charge on an electron is equal to - 1.6 x 10"C and mass of the electron is 9.1 x 10 kg. ...

CBSE Grade   9 Science Syllabus 2020-2021 CBSE grade   9 science syllabus provides the overview of the units and chapter under each unit of science subject. It also give the detail of marks allocated to each unit. Based on this marks distribution the  CBSE grade   9  annual paper will be design. So, it’s very important for the children to know the the CBSE Syllabus for grade   9 Science. It will also help them in planning their studies in advance. Getting familiar with the CBSE Grade   9 Science syllabus gives children an idea about the chapters, marks weightage and time duration. Along with the theory CBSE Grade   9 Science syllabus, children will also find the practical science syllabus. To download the complete CBSE Syllabus for Grade   9 in PDF format visit the link below. Download CBSE Grade   9 Science Syllabus PDF 2020-2021 Knowing the  CBSE Syllabus  for Grade   9 Science for academic year 2020-2021 will help ...

MOTION LEARNING OBJECTIVES          After a study of the chapter, the learner will be able to • Distinguish between uniform and non-uniform motion using the graphical method. • Calculate numerically value the displacement, velocity, or acceleration using an equation of motion. Appreciate that uniform circular motion is accelerated motion. • Identify the given physical quantities as vector or scalar. • Explain that motion is relative in nature. Motion forms an integral part of our life. All microscopic and macroscopic objects in-universe show some kind of movement. All of the objects such as planets, moons, etc. It also exhibits motion.                                All these examples can be clearly understood and discuss if we can describe motion, its property, and other related aspects such as...