speed
frequency
wavelength
All the above
B. frequency
INSAT
Bhaskara
Aryabhatta
All the above
power
velocity
energy widely used in nuclear physics
number of electrons
protons
electrons
neutrons
positrons
momentum
velocity
acceleration
inertia
taking photos of various objects
recording and reproducing three dimensional images
tracing out planets and stars in the sky
transmitting light waves
the forces of cohesion of the molecules within are very much less in them
the forces of cohesion are very large
the forces of adhesion are large
the forces of adhesion are less
they contain free electrons
their atoms are relatively far apart
their atoms collide frequently
they have reflecting surfaces
umbra
penumbra
image
black portion of light
Liquid ammonia
Carbon tetrafluoride
Dichloro-difluoro-methane
Sulphur dioxide
refraction
reflection
total internal reflection
parallax
are good conductors of heat
are cheaper
are easily obtained
are bad conductors of heat
the valve filaments have low resistance
valve-radio sets work at a higher voltage
transistor set has a low resistance
filaments of the valves cake time to beat up and function
increase
decrease
remain the same
None of the above
about 75% of hydrogen
22% helium
traces of most other elements including oxygen, neon, carbon and nitrogen
All the above
Evaporation at the surface causes cooling
The heat obsorbed at the surface is passed on to the bottom
Because of impurity in the water
Because of convection currents set up inside water
sinks less in the sea
sinks more in the sea
neither sinks more nor less in the sea
sinking more or less depends on sea
increases
decreases
remains the same
first increases and then decreases
Jupiter
Mercury
Venus
Sirius
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
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
historical sites
architecture
sound
trigonometry
their heat contents
their masses
their temperatures
whether they are in solid, liquid or gaseous state
a microphone
a headphone
a phonograph
an amplifier
velocity
wavelength
frequency
Both (a) and (b) above
an altimeter
a fathometer
a hydrometer
a sonometer
U-234
U-235
U-238
Both (b) and (c)
Microphone converts sound energy into electrical energy.
Electric fan converts electrical energy into mechanical energy.
Battery converts chemical energy into electrical energy.
All the above
distance from the earth
age
temperature
size
heat waves
sound waves
radio waves
light waves
purity
hardness
high density
high refractive index and low critical angle