A sound consists of four frequencies- 300hz, 600hz, 1200 hz and 2400 hz.A sound 'filter' is made by passing this sound through a bifucated pipe. The sound waves have to travel a distance of 50 cm more in the right branch-pipe than in straight pipe. The speed of sound in air is 300m/s. Then, which of the following frequencies will be almost completely muffled or "silenced" at the outlet?

(A) 300 hz (B) 600 Hz (C)1200 Hz (D)2400 hz

Density of a substance at 0/C is 10.6 gm/c.c and at 100/C is 10 gm/c.c coefficient of linear expansion of solid is?

1) 0.0006/C 2) 0.0004/C 3) 0.0003/C 4) 0.0002/C

when an object moves closer to a concave lens the image formed by it shifts

a] away from the lens b] first away then towards the lens c] towards the lens d] first towards and then away from the lens

The position coordinates of an object are given by x= 2t^{2}_{,}y=t^{2}-4t, z=3t-5. The average velocity of the particle during the interval 0.1 sec is?

I think the question is wrong as the answer is given as root22. Can you please rectify the question?????????????

^{2}, R = 1 m ).A sound consists of four frequencies- 300hz, 600hz, 1200 hz and 2400 hz.A sound 'filter' is made by passing this sound through a bifucated pipe. The sound waves have to travel a distance of 50 cm more in the right branch-pipe than in straight pipe. The speed of sound in air is 300m/s. Then, which of the following frequencies will be almost completely muffled or "silenced" at the outlet?

(A) 300 hz (B) 600 Hz (C)1200 Hz (D)2400 hz

1) net force= Pcostheta , if P cos theta< mg

2)N= mg -Psin theta , if Psintheta< mg

3) a=Pcostheta/m , when P> mgcostheta

Density of a substance at 0/C is 10.6 gm/c.c and at 100/C is 10 gm/c.c coefficient of linear expansion of solid is?

1) 0.0006/C 2) 0.0004/C 3) 0.0003/C 4) 0.0002/C

when an object moves closer to a concave lens the image formed by it shifts

a] away from the lens b] first away then towards the lens c] towards the lens d] first towards and then away from the lens

The position coordinates of an object are given by x= 2t

^{2}_{,}y=t^{2}-4t, z=3t-5. The average velocity of the particle during the interval 0.1 sec is?I think the question is wrong as the answer is given as root22. Can you please rectify the question?????????????