The escape velocity of a satellite projected from the surface of the earth is independent of
the mass of earth
the mass of the satellite
the radius of the earth
gravitation of the earth
Correct Answer :
B. the mass of the satellite
Related Questions
A light year means
a unit of time
a unit of length
a year of no consequence
illumination throughout the year
Solar radiation is preferred to other sources of energy because
it is practically inexhaustible
it is the cheapest form of energy
it does not cause pollution
All of the above
Formation of shadows can be explained by
rectilinear propagation of light
reflection
refraction
total internal reflection
Every action has an equal and opposite reaction is Newton's law of Motion
first
second
third
fourth
To get 5 images of a single object one should have two plane mirrors inclined at an angle of
72°
60°
36°
90°
The rate of cooling of a hot body depends on
the nature of the radiating surface
area of the radiating surface
temperature difference between the body and the surroundings
All the above
A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance
will increase
will decrease
does not change
varies with the increase of depth of the immersion of the iron piece
Who first established the fact that the earth revolves round the sun?
Sir Isaac Newton
Kepler
Copernicus
Ptolemy
A ruse wire is characterised by
high resistance and high melting point
high resistance and low melting point
low resistance and high melting point
low resistance and low melting point
A person cups his hand around the mouth when shouting. Why?
Sound energy from his mouth is then directed in one direction
The cupped hand acts as a cardboard tube of short length
The pitch of sound increases
Both (a) and (b)
The instrument used to measure the strength of electric current at a point is
Ammeter
Altimeter
Adrinometer
Anemometer
Which of the following apparatus is used in the electrolysis of water?
Voltmeter
Voltameter
Ammeter
Potentiometer
The strength of an electromagnet can be increased by
increasing the length of the coiled wire
increasing current supply
increasing the size of the iron core
All the above
Diamond shines because of its
purity
hardness
high density
high refractive index and low critical angle
The instrument used to determine the RD (Relative Density) of a liquid by the principle of floatation is
Hygrometer
Hypsometer
Hydrometer
Densimeter
A piece of ice is Boating In water kept in a beaker. When all the ice melts the level of water will
first rise and then fall
fall
remain the same
rise
A device used to measure heights above sea level is known as
altimeter
anemometer
dilatometer
potentiometer
'Acoustics' is a branch or study dealing with
historical sites
architecture
sound
trigonometry
The neutron, one of the constituent particles of which the nuclei of atoms are composed was discovered by
Irene Curie
W Bothe and H Becker
James Chadwick
Jean Joliot
Credit for starting Space Science Research in India goes to
HJ Bhabha
SS Bhatnagar
V Sarabhai
CV Raman
A proton is
a quantum of light energy
a quantum of matter
a positively charged atomic particle
another name for positron
Increase in pressure
increases the melting point of ice
decreases the melting point of ice
has no effect on the melting point of ice
increases the volume of the ice
In a refrigerator, the refrigerant is
Nitrogen
Oxygen
Chlorine
Freon
The earth satellite Aryabhatta was put in orbit by India on
October 20, 1978
November 14, 1978
January 26, 1979
April 19, 1975
Isotones are species of atoms containing
same number of protons but different number of neutrons
same number of neutrons but different number of protons
the same total number of protons and neutrons
same number of protons and different number of electrons
When we tighten the string of a sitar or tanpura its pitch
remains the same
increases
decreases
None of the above
Water kept in an earthen pot is less cool on rainy days than in summer because during the rainy days
the pores in the pot are closed
rain water stops oozing out from the pores
the water that oozes out does not evaporate quickly because of the large percentage of moisture in the air
surface of the pot becomes damp
Changing of one element into another element is known as
transmutation
fission
fusion
radioactivity
The heating element often used in an electric iron is
copper
tungsten
mica
nichrome
The focal length or lens or the eye is under the control or the
iris
pupil
ciliary body
cornea