speed of sound is greater in steel than in air
speed of sound is greater in air than in steel
part of sound waves is reflected between rail tracks
the boy's ears are at a different distance from the source
A. speed of sound is greater in steel than in air
cohesion
adhesion
capillary action
absorption
greater than the weight of the man
less than the weight of the man
same as the weight of the man
zero
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
a convex mirror behind it
a concave lens behind it
a concave mirror in front of it
a concave mirror behind it
will jump rapidly up and down for a short time
will remain unaffected
Both (a) and (b) above
It will produce electric shock
steel
wood
soft iron
copper
Cosmic rays
Infrared rays
All radiations of light
Ultra violet rays coming from the sun
it resists oxidation when red hot
its melting point is high
it has got 60 times the resistance of copper
All the above
copper
tungsten
mica
nichrome
rubber
plastic
aluminium
wood
Albert Einstein
Enrico Fermi
HJ Bhabha
Sir Isaac Newton
the immersed volume of the body
density of the liquid
acceleration due to the gravity at the place
All the above
momentum
velocity
acceleration
inertia
both walls are silvered on the vacuum side
there is vacuum between the double walls
the cork is a poor conductor of heat
of all the above
50 kg
45 kg
zero
150 kg
the mass of earth
the mass of the satellite
the radius of the earth
gravitation of the earth
the rise of temperature
rise of its frequency
decrease in humidity
fall of temperature
will increase
will decrease
does not change
varies with the increase of depth of the immersion of the iron piece
Sun
Jupiter
Mercury
Earth
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
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
Ammeter
Altimeter
Adrinometer
Anemometer
power
velocity
energy widely used in nuclear physics
number of electrons
remains the same
increases
decreases
None of the above
colours of the rainbow
colours in the spectrum of white light
colours which cannot be produced by mixing other colours
colours found in nature
the rise of temperature
rise of its frequency
decrease in humidity
fall of temperature
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
power
velocity
energy widely used in nuclear physics
number of electrons
a thermopile
a load
a step down device
a safety device
1
infinite
0
4