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
B. the resonant vibrations caused by their marching can damage the bridge increasing the amplitude to dangerous proportions
are electromagnetic waves
can easily pass through vacuum
are always transverse waves
require a material medium for propagation
a straight line
an ellipse
a circle
a parabola
when the moon passes between the sun and the earth
when the sun comes between the earth and the moon
when the earth comes between the sun and the moon
on a full moon day
ultraviolet rays
gamma rays
radio waves
infrared waves
Thorium
Uranium
Plutonium
Radium
Wilhelm Roentgen
WO Coolidge
Henry Cavendish
William Watson
chemical energy into heat energy
mechanical energy into heat energy
protons into neutrons
mass into energy according to Einstein's equation
air
glass
vacuum
water
the centripetal force
the centrifugal force
the frictional force
All the above
Copernicus
Ptolemy
Newton
Kepler
increases
decreases
remains the same
first increases and then decreases
enclosing it in a thick walled iron box
wrapping it with an insulator
by placing it inside a glass case
by surrounding it with fine copper gauze
a high resistance
a very low resistance
no resistance at all
resistance of 400 � w
in air
in an atmosphere of oxygen
in an atmosphere of CO2
in vacuum
212°
32°
-40°
0°
an indeterminate quantity
equal to the weight of the ship
greater than the weight of the ship
less than the weight of the ship
the loudness of the sound increases
the loudness remains the same
the loudness decreases
the sound suddenly stops
to keep it away from the hot compressor which is near the bottom
because of convenience
so that it can cool the whole interior by setting up convection currents
to prevent too much cooling
a planet
a meteor
a star
a comet
the eye lens being thin
the eye lens being thick
lack of symmetry in the curvature of the eye preventing rays of light from being brought to a common focus
the pupil being very small
replace the fuse by a thin wire
replace the fuse by a thick copper wire
replace the fuse by a fuse wire of proper rating
replace the fuse by nichrome wire
a kilometre
light year
the average distance from the earth to the sun
None of the above
in the live wire
in the neutral wire
in the earth wire
anywhere
umbra
penumbra
image
black portion of light
refraction of light from them through air
reflection
absorption
All the above
can focus very rapidly as pictures change
is quicker than the brain
can see two images separated only if the interval' between seeing them is more than' one-tenth of a second
can shut out some of the light
momentum
velocity
acceleration
inertia
protons
electrons
neutrons
positrons
umbra
penumbra
image
black portion of light
0 K
273 K
373 K
100 K