1
MHT CET 2021 23rd September Evening Shift
+1
-0

Two sound waves having wavelengths $$5.0 \mathrm{~m}$$ and $$5.5 \mathrm{~m}$$ propagates in a gas with velocity 300 $$\mathrm{m} / \mathrm{s}$$. The number of heats produced per second is

A
six
B
two
C
three
D
one
2
MHT CET 2021 23rd September Evening Shift
+1
-0

The frequency of a tuning fork is $$220 \mathrm{~Hz}$$ and the velocity of sound in air is $$330 \mathrm{~m} / \mathrm{s}$$. When the tuning fork completes 80 vibrations, the distance travelled by the

A
120 m
B
60 m
C
53 m
D
100 m
3
MHT CET 2021 23th September Morning Shift
+1
-0

Two waves $$\mathrm{Y}_1=0.25 \sin 316 \mathrm{t}$$ and $$\mathrm{Y}_2=0.25 \sin 310 \mathrm{t}$$ are propagation same direction. The number of beats produced per second are

A
$$\frac{3}{\pi}$$
B
$$\frac{\pi}{3}$$
C
$$\frac{\pi}{2}$$
D
$$\frac{2}{\pi}$$
4
MHT CET 2021 23th September Morning Shift
+1
-0

Two waves are represented by the equation, $$\mathrm{y}_1=\mathrm{A} \sin (\omega \mathrm{t}+\mathrm{kx}+0.57) \mathrm{m}$$ and $$\mathrm{y}_2=\mathrm{A} \cos (\omega \mathrm{t}+\mathrm{kx}) \mathrm{m}$$, where $$\mathrm{x}$$ is in metre and $$\mathrm{t}$$ is in second. What is the phase difference between them?

A
B
C
D