MCQ - CBSE Class 9 Science Give reasons for the following: 10/04/2023 Ajit kumar 83 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Sound of explosions taking place on other planets is not heard by a person the earth. Give reason. 10/04/2023 Ajit kumar 90 Views 0 Comments Read more
MCQ - CBSE Class 9 Science What type of wave is represented by density – distance graph? 10/04/2023 Ajit kumar 94 Views 0 Comments Read more
MCQ - CBSE Class 9 Science What is echo ranging? State any one application of this technique. 10/04/2023 Ajit kumar 77 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Give two applications of ultrasound. 10/04/2023 Ajit kumar 72 Views 0 Comments Read more
MCQ - CBSE Class 9 Science How do our ears permit us to receive the sound ? 10/04/2023 Ajit kumar 97 Views 0 Comments Read more
MCQ - CBSE Class 9 Science State three factors on which the speed of sound in a medium depends. 10/04/2023 Ajit kumar 73 Views 0 Comments Read more
MCQ - CBSE Class 9 Science State whether the following waves are transverse or longitudinal waves : 10/04/2023 Ajit kumar 65 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Bats have no eyes still they can ascertain distances, directions, nature and size of the objects. Explain why. 10/04/2023 Ajit kumar 76 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Explain why there is usually a time delay between observing a flash and hearing a thunder ? 10/04/2023 Ajit kumar 64 Views 0 Comments Read more