sound energy is converted into electrical energy
electrical energy is converted into sound energy
sound energy is converted into mechanical energy
mechanical energy is converted into sound energy
A. sound energy is converted into electrical energy
a parabola
a horizontal straight line
a vertical straight line
a circle
taking photos of various objects
recording and reproducing three dimensional images
tracing out planets and stars in the sky
transmitting light waves
historical sites
architecture
sound
trigonometry
surface tension
capillarity
viscosity
diffusion
Copper
Lead
Tin
Iron
for measuring the velocity of wind
in the manufacture of fireworks
in finding the coefficient of apparent expansion of a liquid
for measuring high temperatures
Volts
Amperes
ohms
coulombs
refraction of light from them through air
reflection
absorption
All the above
the marching in steps will involve a big strain on them
the resonant vibrations caused by their marching can damage the bridge increasing the amplitude to dangerous proportions
the marching may obstruct other traffic
rumblings of their marching may disturb the surroundings
will increase
will decrease
does not change
varies with the increase of depth of the immersion of the iron piece
it is practically inexhaustible
it is the cheapest form of energy
it does not cause pollution
All of the above
X
Y
X + Y
X Y
the reflection of sound waves
the refraction of sound waves
the interference of sound waves
reverberation of sound waves
outward stream of protons and electrons on the surface of the sun during solar flares and sun-spot activity
plasma
ionized gas
All of these
alternating current of very high frequency
alternating current of very high voltage
a very large direct current
a high voltage direct current
copper
tungsten
mica
nichrome
planets do not have light of their own whereas stars shine by their own light
planets do not twinkle like stars
planets are much smaller than stars
All the above
the reflection of sound waves
the refraction of sound waves
the interference of sound waves
reverberation of sound waves
cohesive force
surface tension
diffusion
viscosity
troposphere
stratosphere
mesosphere
ionosphere
greater than the weight of the man
less than the weight of the man
same as the weight of the man
zero
loudness
pitch
quality or timbre
All the above
red
violet
green
yellow
helium
argon
hydrogen
oxygen
both its mass and weight will be different
its mass will be different but the weight will remain the same
its mass and weight will both remain unchanged
its mass will remain the same but weight will be different
Galileo
Bhaskara
Aryabhatta
Ptolemy
velocity
wavelength
frequency
Both (a) and (b) above
the mountains found on the surface of the Sun
the dark patches on the sun having less temperature than the normal sun's surface
ionized gas found near the solar surface
the magnetic storms on the surface of the Sun
half
one fourth
four times
two times
Dalton
Rutherford
Einstein
Planck