CBSE ADDA

Topic included Factories taking common factors Factories regrouping terms Factories using algebraic identity Factories by spliting middle term For more practice paper visit : Jsuniltutorial.in

IX Class Question solution for Physics Chapter Sound 1. How sound is produced? Answer:   Sound is produced by the vibration of vibrating object. 2. What do you understand by a ‘wave’? Answer:  A periodic disturbance created in material medium that transfer sound and light energy is called wave. 3. Write three differences between sound and light waves. Answer:   sound wave is Mechanical wave that require material medium for propagation where as light waves are electromagnetic wave that can travel in vacuum. 4. What do you understand by “sound energy cannot be produced”? Answer: Sound energy cannot be produced on its own. Some mechanical energy is required to make an object vibrate. It is the mechanical energy of the vibrating object which travels through a medium and ultimately reaches the ear. 5. What is the name of the wave that can travel through vacuum? Answer:   Electromagnetic wave 6. Explain by some experiment that sound waves require medium for their

The Question Paper in each of the Summative Assessment will be of 80 marks and of three hours duration. The syllabus has been divided into two parts, one for the first term and the other for the second term. Sample Question Paper DAV SA-II Board Paper Mathematics [2013-14]  Download File DAV SA-II Board Paper Science [2013-14] Download File DAV SA-II Board Paper Mathematics [2013-14]  Download File DAV SA-II Board Paper Science [2013-14] Download File DAV SA-II Board Paper Mathematics [2012-13] Download File DAV SA-II Board Paper Science [2012-2013] Download File DAV SA-II Board Paper Mathematics [2011-12] Download File DAV SA-II Board Paper Science [2011-2012] Download File DAV SA-II Board Paper Mathematics [2010-11] Download File DAV SA-II Board Paper Science [2010-2011] Download File   Post related to DAV class 8th paper 2019 Post related to DAV class 8th paper Mid term exam DAV class 8 Board Paper [DAV EDUCATION BOARD] dav board sample papers of 8th class cbse sample

8th Maths Sample paper for  Practice  1. What least number must be subtracted from 7250 to get a perfect square? Also, find the square root of this perfect square 2. What is the least number by which 12348must be divided to obtain a perfect square? 3. Find the cost of erecting a fence around a square field whose area is 9 hectares if fencing costs Rs 3.50 per metre 4. Find the least number of six digits which is a perfect square. Find the square root of this number. 5. Divide (1) x3 - 1 by x - 1 (2) 7 +15x -13x2 +5x3 by 4 - 3x + x2 6. . x + y + z = 0, prove that x 3+ y3 + z3 = 3xyz. Or, Factorize : (a8 – b8) 7. If ( x2 + 1/X2) = 83 . Find X3- 1/X3 Or, , Factorize (i) 25a² – 4b² + 28bc – 49c² (ii) 5y² – 20y – 8z + 2yz 8. A motor boat covers a certain distance downstream in a river in 5 hours. It covers the same distance upstream in 6 hours. The speed of water is 2 km/hr . Find the speed of the boat in still water. 9. Th

 Sample Question Papers Class-VIII Summative Assessment I (Year 2013 - 14)  Mathematics Question Papers Class-VIII Summative Assessment I Download File Science and Technology Question Papers Class-VIII Summative Assessment I Download File Question Papers Class-VIII Summative Assessment II (Year 2013 - 14) Mathematics Question Papers Class-VIII Summative Assessment II Download File Science and Technology Question Papers Class-VIII Summative Assessment II Download File Fore more sample paper visi t     8th Maths Sample papers