MCQ - CBSE Class 9 Science A continuous disturbance is created on the surface of water in a ripple tank with a small piece of cork floating on it. Describe the motion of cork. What does it tell about the disturbance ? 10/04/2023 Ajit kumar 71 Views 0 Comments Read more
MCQ - CBSE Class 9 Science What is Galton’s whistle? To what use it can be put ? 10/04/2023 Ajit kumar 96 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Give reasons for the following: 10/04/2023 Ajit kumar 74 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 80 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 84 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 70 Views 0 Comments Read more
MCQ - CBSE Class 9 Science Give two applications of ultrasound. 10/04/2023 Ajit kumar 61 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 87 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 66 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 58 Views 0 Comments Read more