The reflected sound is called
Echo
Resonance
Reverberation
Pitch
Hertz is the unit of
Frequency
Wavelength
Amplitude
Displacement
The distances travelled by a body falling freely from rest in the first ,second and third seconds respectively are in the ratio:
1 : 4 : 9
1 : 2 : 3
1 : 9 : 25
1 : 3 : 5
The sound produced by musical instruments in big halls may linger even after the instrument stops producing sound. This is known as
If A and B are two objects with masses 6 kg and 34 kg respectively,then
A has more inertia than B
B has more inertia than A
A and B have same inertia
none of the two has inertia
A projectile has maximum range when the angle of projection is
900
450
600
300
S.I unit of momentum is
kg m/s2
kg m/s
kgm-1s-1
kgs
Velocity of sound is
380 m/s
340 m/s
3x108 m/s
360 m/s
m / s2 is the unit of :
speed
acceleration
displacement
time
A car which travels through the road with different velocities in equal intervals of time is said to have
Uniform acceleration
Nonuniform acceleration
Retardation
Uniform motion