A projectile is fired at an angle with the horizontal with a small velocity. Its horizontal range will be maximum when the angle with the horizontal is
0°
30°
45°
60°
Correct Answer :
C. 45°
Related Questions
An ammeter has
a high resistance
a very low resistance
no resistance at all
resistance of 400 ? w
Which force is used when milk is churned to separate cream?
cohesive
centrifugal
frictional
gravitational
Skating on ice is possible because
the surface of ice is smooth
ice is cold
the pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
the pressure on the ice due to skate raises its melting point
The electroplating of a metallic article
protects the article from atmospheric corrosion
gives it a more attractive appearance
Both (a) and (b) above
None of the above
Which of the following pairs is not correct?
Television - Baird
Transistor ~ Shockley
Thermometer - Celsius
Barometer Torricelli
When two similar sources vibrate with slightly different frequencies, a regular rise and fall occurs in the loudness of tone. This phenomenon Is known as
doppler effect
beats
resonance
echo
If a bar magnet is broken into two pieces
both pieces will lose their magnetism
one piece will have North Pole on both ends and the other South Pole on its both ends
each will remain a magnet with North Pole at one end and South Pole at the other
the longer piece will behave as a bar magnet while the smaller will have no magnetism at all
Mica is used in an electric iron because it is a
good conductor of heat
good conductor of electricity
bad conductor of electricity
Both (a) and (b) above
An astronomical unit of distance is
a kilometre
light year
the average distance from the earth to the sun
None of the above
The electrical domestic tube light gives white fiourescent light because of
collision between molecules of filled gas under electric current
heavy current
vacuum inside the tube
falling of ultra violet rays on the white inner coating of the tube
Sound waves in air are
transverse
longitudinal
transverse and longitudinal
neither transverse nor longitudinal
When ice just melts
there is no change in volume
there is no change in temperature
heat is given out
there is no change of state
Chronometer is an instrument to measure
heat
electric potential
time
distance between two points
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
The presence of impurities
lowers the melting point of ice
raises the melting point of ice
has no effect on the melting point of ice
may lower or raise the melting point depending upon the type of impurities
The tiniest of the stars belong to the group known as
Giant stars
White Dwarf stars
Neutron stars
Super-giant stars
Heat is transmitted from one end of a metal rod to its other end by the method of
conduction
convection
radiation
sublimation
The instrument used to measure atmospheric pressure is
Pyrometer
Eudiometer
Barometer
Hydrometer
How is it that Pluto is not always the farthest planet of the solar system?
Each planet becomes the farthest planet in its turn. Now it is the turn of Piuto
The Sun is now in the zodiac in which it is nearest to outer planets
The eccentricity of Piuto's orbit being substantial, this orbit cuts the orbit of Neptune
Piuto belongs to other solar system
A piece of cork la embedded inside an ice block which floats in water. What will happen to the level of water when all ice melts?
It will go down
It will come up
It will remain at the same level
First it will go down and it will come up
Commonly used safety fuse wire is made of
Tin
Lead
Nickel
An alloy of tin and lead
The attraction of unlike molecules at the common surface is known as
adhesion
cohesion
surface tension
capillarity
No current will flow between two charged bodies if they have the same
resistance
charge
potential
charge/potential ratio
The study of astronomy include a
astrology
astrophysics
astrometry
Both (b) and (c) above
Cosmic rays contain
protons and electrons
alpha particles
gamma rays
All the above
For viewing objects placed at a higher level from a position at a lower level, the instrument used' Is known aa
telescope
spectrometer
microscope
periscope
A lactometer is used to
find out the specific gravity of liquids
measure the volumes of liquids
test the purity of milk
determine the strength of acid in car batteries
The device used to record the sound is
a microphone
a headphone
a phonograph
an amplifier
When a swing is drawn to a side Its potential energy In relation to the earth
increases
decreases
remains the same
is constant
The property of a fluid by which it resists relative motion within itself is known as
cohesive force
surface tension
diffusion
viscosity