If the forces acting on a falling body balance one another, the body continues to fall at a constant velocity. What is this constant velocity called?
AInstantaneous velocity
BFree-falling velocity
CGravitational velocity
DTerminal velocity
ESAS · Question Bank
Physics
107 of 236 questions match · page 5 of 6. Answer in your head first, then check the solution.
What do light, radiowaves, microwaves, and X-rays have in common?
AThese waves were predicted by only one person, James Maxwell
BThese do not need a medium to travel in
CThese waves are all mechanical waves
DThese waves are all serendipitous waves
Why is sound wave travel faster in water than in air?
ABecause water has greater density than air
BBecause water has greater bulk modulus than air
CBecause water has more in terms of number of molecules than air
DBecause water has more in volume than air
What is the wavelength band in nanometer of visible light?
A350nm - 700 nm
B350nm - 800 nm
C300nm - 700nm
D300nm -800nm
What term is used to describe the angular opening of sphere that encloses the mirror?
AAngle of curvature
BFocal point
CAperture
DVertex
What makes the sun visible even before it is in line with the horizon?
ADiffraction
BReflection
CRefraction
DDiffusion
What refers to the defect in lenses which causes unequal refraction of the different colors?
AChromatic diffraction
BChromatic polarization
CChromatic aberration
DChromatic dispersion
The range of the projectile is:
Adirectly proportional to the gravitational acceleration
Bdirectly proportional to the square velocity
Cdirectly proportional to the velocity
Dinversely proportional to the velocity
The velocity of projection of a body which takes it beyond the earth's gravitational attraction is called __________ of the body
Aterminal velocity
Bdrag velocity
Cescape velocity
Dgeostationary velocity
The escape velocity is:
Athe same for all bodies
Bdependent on the mass of the body
Cinversely proportional to the gravitational constant
Ddependent on the distance of the body from the surface of the earth
The speed of sound is ________ the density of a gas?
Adirectly proportional to
Binversely proportional
Cindependent of
Dspeed of light divided by
Indicate FALSE statement
ASound travels faster in hydrogen than nitrogen
BSound travels faster in low density gases
CSpeed of sound increases with the increase in temperature
DSpeed of sound in dry air is more than the speed of sound in moist air
The velocity of sound is ________ the pressure of gas
Adirectly proportional to
Binversely proportional to
Cindependent of
Dthe speed of light divided
The _________ of the source is the luminous flux per unit area of the source
Aluminous emittance
Bluminous efficiency
Cluminous intensity
Dillumination
In opaque material,
Alight is able to pass through
Bthe refracted energy is absorbed within a very thin layer and converted to heat
Clight is partially absorbed
Dthe refracted energy is absorbed within a thick layer and converted to heat
In translucent material,
Alight is able to pass through
Bthe refracted energy is absorbed within a very thin layer and converted to heat
Clight is partially absorbed
Dthe refracted energy is absorbed within a thick layer and converted to heat
In transparent material,
Alight is able to pass through
Bthe refracted energy is absorbed within a very thin layer and converted to heat
Clight is partially absorbed
Dthe refracted energy is absorbed within a thick layer and converted to heat
What refers to two colors which combines to form white light?
AComplementary colors
BSecondary colors
CPrimary colors
DElementary colors
A spectrum consisting of a wide range of unseparated wavelength is called _________
Avisible spectrum
Bcontinous spectrum
Cemission spectrum
Ddiscontinous spectrum
The six colors of which sunlight is composed are called _________
Asecondary colors
Bprimary colors
Ccomplementary colors
Delementary colors