warm and moist
cool and dry
warm and dry
cool and moist
D. cool and moist
force
velocity
acceleration
speed
the air circulated by the fan is cool
the fan produces convection currents of air
the air circulated by the fan quickens the evaporation of the moisture on our skin
the air takes away the heat from our body
of the surface tension of mercury
mercury is a semi-solid
of the high viscosity of mercury
the density of mercury is greater than that of steel
alcohol is a poor conductor of heat
alcohol can be coloured for its level to be seen easily
its freezing point is very low
it will not stick to the glass tube
Crown glass
Water
Flint glass
Diamond
red
violet
green
yellow
18 km/sec
11.2 km/ sec
21 km/ sec
35 km/ sec
sterilising food stuff
controlling pests
cancer therapy
All of these
sugar
sodium carbonate
common salt
carbonates of calcium and magnesium
warm and moist
cool and dry
warm and dry
cool and moist
the same as that of an audible sound
above the audible range
below the audible range
None of the above
frequency is higher
wavelength is smaller
pitch is smaller
air is warmer
Neptune
Uranus
Jupiter
Saturn
half
one fourth
four times
two times
U-234
U-235
U-238
Both (b) and (c)
absorption of a neutron by a nucleus
breakup of the nucleus of a heavy atom into two nearly equal halves emitting two or three neutrons and releasing large amounts of nuclear energy in the process
the scattering of neutrons
formation of heavier nucleus
are electromagnetic waves
can easily pass through vacuum
are always transverse waves
require a material medium for propagation
Copernicus
Ptolemy
Newton
Kepler
the nature of the radiating surface
area of the radiating surface
temperature difference between the body and the surroundings
All the above
there is no change in volume
there is no change in temperature
heat is given out
there is no change of state
increases
decreases
remains unchanged
first decreases then increases
oxidation of the tungsten filament
bursting of the bulb
loss of light due to absorption
keeping the weight of the bulb less
increase
decrease
will not change
first increase and then decrease
electrical energy into light energy
light energy into electrical energy
light energy into heat energy
electrical energy into heat energy
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
virtual and upright
virtual and inverted
real and inverted
real and upright
zero
the centrifugal force
reaction due to steady burning of fuel
the gravitational pull on the body by the earth is the weight of the body which provides the centripetal force
is real
is virtual
can be obtained on a screen
is slightly bigger than the object
pouring ice cold water into the inner tumbler
pouring ice cold water on the outer tumbler
pouring hot water into the inner tumbler
dipping both the tumblers in hot water
50 kg
45 kg
zero
150 kg