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Do you have an academic question? When the earth spins, why don’t we spin? How does light travel? Such questions and more are answered on this online discussion platform. You will find education experts coming forward to answer your academic questions.

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Ask and have all your academic questions answered on one platform. Questions about your courses, exams, and other queries related to the field of academics can be raised, answers will be exchanged and we all keep learning.

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According to the first law of reflection,  the angle of incidence is equal to the angle of reflection  
Infrasound –  Less than 20Hz,Audible Range – 20Hz to 20KHz, Ultrasound  – Greater than 20Khz
Spikes on the soles of shoes increase the grip as the spikes allows the runner to push off the ground without slipping easily due to the normal
Because to form the complete image only two rays are to be passed through the lens and moreover, since the total amount of light released by the
In the above cases, rubbing of glass would have less resistive force due to poor interlocking. So, among the given cases rubbing of glass would
Infrasound –  Less than 20Hz Audible Range – 20Hz to 20KHz  Ultrasound  – Greater than 20Khz

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