Related Questions

The word ‘gratify’ can be replaced by the word
A satisfy
B comfort
C disturb
D beautify
The majority of electromagnetic waves emitted by the human body--
A are above 760 millimicrons in length
B vary between 380 and 760 millimicrons in length
C translate into thermographic techniques
D are below 3890 millimicrons in length
Often visible as smog , ozone is formed in the atmosphere form" hydrocarbons and nitrogen oxides , two major pollutants emitted by automobiles react with sunlight .
A ozone is formed in the atmosphere from
B ozone is formed in the atmosphere when
C ozone is formed in the atmosphere when
D ozone is formed in the atmosphere ,and when
Choose the correct option to replace the quotation part of each sentence. Often visible as smog, 'ozone is formed in the atmosphere from' hydrocarbons and nitrogen oxides, two major pollutants emitted by automobiles, react with sunlight.
A ozone is formed in the atmosphere from
B ozone is formed in the atmosphere when
C ozone is formed in the atmosphere, and when
D ozone, formed in the atmosphere when
Which of the following gases emitted from automobile exhaust is poisonous?
A Carbon monoxide
B Carbon dioxide
C Hydrocarbons
D Sulphur dioxide
The radiation emitted by a black body is known as
A Black radiation
B Full radiation
C Total radiation
D All of these
Which among the following is a positively charged particle emitted by a radioactive element?
A Beta ray
B Alpha ray
C Cathode ray
D Gamma ray
Out of the following, which is not emitted by radioactive substance?
A Electrons
B Electromagnetic radiations
C Alpha particles
D Neutrons
Remote sensing techniques make use of the properties of ___________ emitted, reflected or diffracted by the sensed objects:
A Electric waves
B Sound waves
C Electromagnetic waves
D Wind waves
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then
A $${\frac{3}{4}^{{\text{th}}}}$$ of it will disintegrate in two months
B It will completely disintegrate in two months
C It will completely disintegrate in four months
D $${\frac{l}{8}^{{\text{th}}}}$$ of it will remain intact at the end of four months

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