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The instrument that measures and records the relative humidity of air is
The shape of our milky way galaxy is
The different colours of different stars are due to the variation of
The fundamental scientific principle in the operation of battery is
Instrument used to measure the force and velocity of the wind is
Which combination of colour the most convenient during day and night time ?
Woolen clothes keep the body warm because
If the length of a simple pendulum is halved then its period of oscillation is
Equilibrium is a condition that can
While catching a ball, a player pulls down his hands to lower the
Geostationary satellite revolves at-
When a barometer reading suddenly recedes, it indicates that climate-
A particle dropped from the top of a tower uniformly falls on ground at a distance which is equal to the height of tower. Which of the following paths will be traversed by the particle ?
Asteroids revolve round the Sun between which of the following two planets ?
Smog is a general pollutant where
The speed of light’ with the rise in the temperature of the medium :
Clothes keep us warm in winter because they :
In a refrigerator what produces the cooling ?
Why are we able to hear short wave broadcasts better than long wave broadcasts ?
Electron microscope was invented by
A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to
Which of the following is not true for Geostationary Satellite?
When pressure is increased the melting point of ice
Longitudinal waves cannot travel through
Electrostatic precipitator is used to control the pollution of
When two ice cubes are pressed over each other they unite to form one cube, because of
Which of the following parts of the sunlight makes the solar cooker hot ?
If the velocity-time graph of a particle is represented by y = mt + v, then the partical is moving with
Which of the following occurred first?
The animal which uses sounds as its ‘eyes’ is
The sky appears blue because of
Dynamo is a device for converting
The working of the quartz crystal in the watch is based on
Why does a big fire in the open appear to be fanned by strong winds ?
Oil rises up the wick in a lamp because
In the atmosphere ultraviolet rays are absorbed by
In which of the following cryogenic engines are used ?
Who propounded the possibility of placing communications satellites in geosynchronous orbit for the first time ?
What was the name of the space shuttle that landed man on the moon ?
The energy emitted by the Sun is due to
Tungsten is used for the manufacture of the filament of an electric bulb, because
What is the wavelength of visible spectrum ?
Who invented Radar ?
Who measured the velocity of light first ?
When a vehicle passes, TV reception gets distorted. This is because
Which of the following alloy is used in making magnet ?
Where are mesons found ?
For a body moving with non-uniform velocity and uniform acceleration
Lamberts law is related to
Which of the following laws validates the statement that matter can neither be created nor destroyed ?