Question
As the temperature of water increases, its viscosity
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$Reason :$ Air surrounding the fire conducts more heat upwards.



${x_1} = a\sin (\omega \,t + {\phi _1})$, ${x_2} = a\sin \,(\omega \,t + {\phi _2})$
If in the resultant wave the frequency and amplitude remain equal to those of superimposing waves. Then phase difference between them is

