JEE 2021 | समतल में गति - L1 | Class 11 भौतिक विज्ञान | Hindi Medium | Ravindra Sir | 11 AM

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Due to a point isotropic sonic source, loudness at a point is L = 40 dB. If density of air is r = 15//11 kg m^(-3) and velocity of sound in air, u = 330 ms^(-1) , calculate. (i) pressure oscillation amplitude at the point of observation, and (ii) ratio oscillation amplitude of particle of medium to wavelength of sonic waves.

Consider two points A=(1,2) and B=(3,-1). Let M be a point on the straight line L=x+y=0 If M be a point on the line L=0 such that |AM-BM| is maximum,then the distance of M from N=(1,1) is

Kinetic Theory of Gases Lecture 1 - Ideal Gas and Gas Law | JEE/NEET/Class 11 Physics Revision

A train with 72 km/h speed crosses a stationary pole in 35 seconds. How much time (in minutes) does it take to cross a 1.1 km long bridge? 72 km/h की गति वाली ट्रेन 35 सेकंड में एक स्थिर खम्भ को पार करती है। 1.1 km लंबे पुल को पार करने में कितना समय (मिनटों में) लगेगा?