light travels very much faster than sound
sound travels faster than light
lightning occurs nearer than thunder
both travel at the same speed
A. light travels very much faster than sound
electrical energy into heat energy
electrical energy into mechanical energy
mechanical energy into electrical energy
mechanical energy into heat energy
convex mirrors
concave mirrors
concave lenses
lenses irrespective of types
Physics
Chemistry
Biology
Economic
reverberate
be heard by us faintly
be heard upto 10 km from it
not be heard at any distance at all from it
mercury
distilled water
alcohol
does not use any liquid
direct sun's rays
radiation from earth's surface
radiogenic heat (resulting from radioactive decay)
cosmic rays coming from space
the surface of ice is smooth
ice is cold
the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
the pressure on the ice due to skate raises its melting point
work is done against gravity
the steepness of the staircase isn't felt
gravity assists
there is no friction between the legs and steps
the telephone ear piece
the telegraph
the electric bell
All the above
find out the specific gravity of liquids
measure the volumes of liquids
test the purity of milk
determine the strength of acid in car batteries
October 20, 1978
November 14, 1978
January 26, 1979
April 19, 1975
to absorb unwanted neutrons
to slow down the fast neutrons to secure more effective hits on other nuclei
to decrease the number of fissile nuclei
to increase the number of fissile nuclei
cohesive
centrifugal
frictional
gravitational
Wilhelm Roentgen
WO Coolidge
Henry Cavendish
William Watson
telescope
spectrometer
microscope
periscope
deflected by electric field
deflected by magnetic field
slightly deflected by electric field and magnetic field
not deflected by electric and magnetic fields
8 minutes
4.3 years
12 seconds
24 hours
on the outer surface
in the inner surface
at the centre of the ring
None of the above
the violet ray
the red ray
the green ray
the blue ray
cannot be attained experimentally
can be attained
is impossible
Does not exist at all
one
two
three
infinite
the heat content of A is greater than that of B
the temperature of A is greater than that of B
the specific heat of A is greater than that of B
the specific heat of B is greater than that of A
a stone
a piece of wood
a feather
all will reach the ground at the same time
increases to a great extent
increases slightly
decreases slightly
decreases rapidly
convection
radiation
conduction
All the three
Television - Baird
Transistor ~ Shockley
Thermometer - Celsius
Barometer Torricelli
�± -rays
�² -rays
�³ -rays
X-rays
a glass rod with flannel
an abonite rod with flannel
a glass rod with silk
Any of the above
at the lower elevation than the bird
at a higher elevation than the bird
in the same direction as the bird
vertically upwards
their heat contents
their masses
their temperatures
whether they are in solid, liquid or gaseous state