The boiling point of water on plains is \( 100^\circ\text{C} \). At hills it will be
A\( 100^\circ\text{C} \)
Bless than \( 100^\circ\text{C} \)
Cmore than \( 100^\circ\text{C} \)
Dmay be any of the above
ESAS · Question Bank
Physics
200 questions · page 2 of 10. Answer in your head first, then check the solution.
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
When common salt is sprinkled on ice, the temperature of ice
Aincreases
Bdecreases
Cremains unchanged
Dnone of these
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
Which of the ff is equivalent to the unit "candela"?
Alumen/m²
Bfootcandle/steradian
Clux/steradian
Dlumen/steradian
What is an elemental unit of energy?
AQuartz
BQuark
CPhoton
DQuantum
What refers to the mass which is accelerated at the rate of one foot per second² when acted on by a force of one pound?
ASlug
BErg
CDyne
DBTU
The size of some bacteria and living cells is in the order of _______
Acentimeter
Bmillimeter
Cnanometer
Dmicrometer
The size of the largest atom is in the order of _______
Acentimeter
Bmillimeter
Cnanometer
Dmicrometer
The mass of a grain salt is in the order of ________
Amilligram
Bgram
Cmicrogram
Dnanogram
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
The scalar product of two perpendicular vectors is always ________
Aequal to 1
Bgreater than 1
Cless than 1
Dequal to 0