On reaching he finds that the school is closed and comes back by a bicycle with his friend and reaches home in 20 minutes. Time taken to cover 3 km = 60 – (40+5)=15 min (iii) km/h. 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Solution: We hope the NCERT Exemplar Class 7 Science Chapter 13 Motion and Time will help you. Solution: (d) Time taken by the bob to move from, Question 8. NCERT exemplar helps the students in gaining clear knowledge of the topics provided in NCERT Class 7 Science textbook.. Class 7 Science NCERT Exemplar questions will help to clearly understand the topics which will eventually help you in studying advanced … Solution: Distance covered by Bholu in second part of the journey = 9-6 = 3 km Solving NCERT Science Exemplar Solution Class 7 questions will not only help students to have better knowledge but also help them to prepare for upcoming competitive exams such as JEE, NEET, etc. Solution: Most of the questions asked in the annual examination are completely from the Class 7 Science NCERT Books Solutions. NCERT Exemplar Class 7 Science is very important because class 7 is the transition between primary and high school. This NCERT exemplar solutions for class 7 science will make you understand the concept in depth. (a) both A and B. (b) 10 m/s Clocks A and B both have minute hands, so time interval of 5 minutes can be measured by both of them. Solution: All the solutions are update for new academic session 2020-21. BYJU’S innovative approach of teaching and presenting the concepts change the way students perceive the knowledge. (d) Time interval of 4 minutes 10 seconds can be measured by clock A. 13.2 of NCERT had been taken at an interval of 10 seconds. (c) Time interval of 5 minutes can be measured by both A and B. Given below as Figure 13.8 is the distance-time graph of the motion an object. (a) Distance time graph for uniform motion shows a straight line. 17. Fill in the blanks: (a) The inner surface of a steel spoon acts as a ___________ mirror. (c) What is his speed between 8 and 12 minutes of his journey? Organisms which prepare food for themselves using simple naturally available raw materials are referred to as (a) heterotrophs (b) autotrophs (c) parasites (d) saprophytes. Time taken by the bob to move from A to C is f, and from C to O is f2. Download Chapter Wise Ncert Exemplar Past 13 Years Solutions For Cbse Class 12 Mathematics 7th Edition Book For Free in PDF, EPUB. (b) A time interval of 30 seconds cannot be measured by clock B. Answer 14. His average speed in km/h is. A spaceship travels 36,000 km in one hour. Question 13. Boojho walks to his school which is at a distance of 3 km from his home in 30 minutes. (c) B to A, A to B and B to O. (a) S=D × T Which of the following cannot be used for measurement of time? (a) more at … (ii) m/min. For a current in a long straight solenoid N- and S-poles are created at the two ends. (b) A time interval of 30 seconds cannot be measured by clock B. (iii) What is the average speed of the object? 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