In three-dimensional space, the direction of a vector might be described in terms of
Aright ascension and declination
Bdistance and speed
Ctime and distance
Dits length
ESAS · Question Bank
Physics
106 of 236 questions match · page 1 of 6. Answer in your head first, then check the solution.
The fluid is the same in all directions. This is known as _________
APascal's Principle
BBernoulli's Theorem
CIdeal Fluid Principle
DArchimedes Principle
The energy stored in a stretched elastic material such as spring is
Amechanical energy
Belastic potential energy
Cinternal energy
Delastic kinetic energy
Cohesion is the attraction between like _______
Aatom
Belement
Ccompound
Dmolecule
Which one of the ff processes of heat transfer requires the presence of a fluid?
Aconduction
Bconvection
Cradiation
Dnone of these
Heat will flow from one body to another in thermal contact with it, when they differ in
Amass
Bspecific heat
Cdensity
Dtemperature
The amount of heat which is absorbed during the change of state of a substance without rise in its temperature is called its
ASpecific heat
BLatent heat
CThermal conductivity
DWater equivalent
A mercury thermometer is constructed at
Aroom temperature
Ba temperature higher than the maximum range of the thermometer
Ca temperature lower than the maximum range of the thermometer
Datmospheric pressure
It is hotter over the top of a fire than at the same distance on the sides because of:
Aconvection of heat
Bconduction of heat
Cradiation of heat
Dconduction, convection and radiation of heat
When a substance is heated, its
Amolecules move more slowly
Bmolecules move more rapidly
Cthere is no change in the speed of its molecules
Dits temperature always increases
The minimum temperature which can be measured with a mercury thermometer is
A\( 0^\circ\text{C} \)
B\( -273^\circ\text{C} \)
C\( -39^\circ\text{C} \)
D\( -143^\circ\text{C} \)
When waves go from one place to another they transport
AEnergy and matter
BWavelength and matter
CFrequency only
DEnergy only
What is the SI unit of luminous intensity?
ACandela
BLumens
CLux
DCandlepower
What is the unit of luminous flux?
ACandela
BLumen
CLux
DFootcandle
The size of some bacteria and living cells is in the order of _______
Acentimeter
Bmillimeter
Cnanometer
Dmicrometer
The English unit slug is a unit of _________
Amass
Bweight
Cforce
Denergy
What is a vector with a magnitude of one and with no unit?
ASingle vector
BUnit vector
CDot vector
DScalar vector
What is the purpose of a unit vector?
ATo describe the direction in space
BTo indicate a magnitude without reference to direction
CTo serve as comparison with other vectors
DTo set a standard among vectors
What is the term for a scalar product of two vectors?
ACross product
BVector product
CDot product
DPlus product
What is another term for vector product of two vectors?
ACross product
BVector product
CDot product
DPlus product