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
to make it smooth and frictionless
to make it rust - proof
to reduce heat loss by radiation
to make it more durable
same number of protons but different number of neutrons
same number of neutrons but different number of protons
the same total number of protons and neutrons
same number of protons and different number of electrons
lead
zinc
carbon
tin
historical sites
architecture
sound
trigonometry
refraction of light from them through air
reflection
absorption
All the above
the ionised hydrogen molecule
the nucleus of helium atom
the nucleus of hydrogen atom
the positive counterpart of electron
conduction
convection
radiation
absorption
they contain free electrons
their atoms are relatively far apart
their atoms collide frequently
they have reflecting surfaces
greater than the weight of the man
less than the weight of the man
same as the weight of the man
zero
increases
decreases
remains the same
first increases then decreases
increases
decreases
remains the same
is constant
Jupiter
Mercury
Venus
Sirius
Platinum
Tungsten
Nichrome
Copper
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
U-234
U-235
U-238
Both (b) and (c)
nichrome
tungsten
copper
aluminium
velocity of sound
velocity of light
a constant factor
wavelength of light
conduction and convection only
conduction and radiation only
convection and radiation only
conduction, convection and radiation
to increase the current flow in a circuit
to decrease the current flow
to measure the flow of electric current
Either (a) or (b) above
a convex mirror behind it
a concave lens behind it
a concave mirror in front of it
a concave mirror behind it
a straight line
an ellipse
a circle
a parabola
cohesion
adhesion
capillary action
absorption
the floor and carpet are at different temperatures
the stone conveys the heat away from the feet more rapidly than the carpet
the carpet is a better conductor of heat than the stone
the human body maintains a constant temperature
an indeterminate quantity
equal to the weight of the ship
greater than the weight of the ship
less than the weight of the ship
Sirius
Vega
Rigel
Proxima Centauri
sterilising food stuff
controlling pests
cancer therapy
All of these
the same direction as the motion
the opposite direction of the motion
all the directions
upward direction
increases
decreases
remains unchanged
first decreases then increases
capillarity
cohesion
adhesion
viscosity
red
violet
green
yellow