MCQ
When you make ice cubes, the entropy of water
- Adoes not change
- Bincreases
- ✓decreases
- Dmay either increase or decrease depending
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${x_1} = a\sin (\omega \,t + {\phi _1})$, ${x_2} = a\sin \,(\omega \,t + {\phi _2})$
If in the resultant wave the frequency and amplitude remain equal to those of superimposing waves. Then phase difference between them is


where $B=$ magnetic field, $l=$ length, $m =$ mass

The angle of projection can be given by