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
236 of 236 questions match · page 1 of 12. Answer in your head first, then check the solution.
At any point along a streamline in an ideal fluid in steady flow, the sum of the pressure, the potential energy per unit volume and the kinetic energy per unit volume have the same value. This concept is known as
ABernoulli's Energy Principles
BFluid Theorem
CPascal's Theorem
DHydraulic Theorem
When the two waves of the same frequency speed and amplitude travelling in opposite directions are superimposed
Athe phase difference is always zero
Bdistractive waves are produced
Cstanding waves are produced
Dconstructive interference always results
The fluid is the same in all directions. This is known as _________
APascal's Principle
BBernoulli's Theorem
CIdeal Fluid Principle
DArchimedes Principle
Which of the ff thermometers is best suited for measuring a temperature of nearly \( 1500^\circ\text{C} \) ?
AGas thermometer
BPlatinum resistance thermometer
CThermocouple thermometer
DMercury thermometer
The energy stored in a stretched elastic material such as spring is
Amechanical energy
Belastic potential energy
Cinternal energy
Delastic kinetic energy
Which of the ff is true? the density of water
Ais maximum at \( 4^\circ\text{C} \)
Bdecreases as the temperature is increased
Cis minimum at \( 4^\circ\text{C} \)
Dincreases with temperature
Cohesion is the attraction between like _______
Aatom
Belement
Ccompound
Dmolecule
The quantity is known as specific heat is based on:
Athe increase in temperature due to induction
Bthe heat needed for one pound of water to boil
Cthe heat needed to increase the temperature to one gram of a substance one degree celsius
Dthe amount of heat required to melt one kg of lead
Which one of the ff processes of heat transfer requires the presence of a fluid?
Aconduction
Bconvection
Cradiation
Dnone of these
When salt is added to water, its boiling point
Aincreases
Bdecreases
Cremains unaffected
Dmay increase/decrease dependingon the pressure
Which one of the ff propagates with the same speed as speed of light?
Asound waves
Bheat waves
Cshock waves
DBeta rays
The surface of the thermos flask is silvered for minimizing heat transfer by what process?
Aconduction
Bradiation
Cconvection
Dvaporization
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
The scientist who systematically demonstrated the equivalence of mechanical energy and heat was
AJoule
BBoltzmann
CFaraday
DKelvin
On a sunny day at the beach, the sand gets so hot and the water stays relatively cool is due to the difference in ___________ of water and sand
Adensity
Bspecific heat
Cdepth
Dthermal conductivity
The instrument, which measures temperature by radiation, is called
Athermopile
Bthermometer
Cpyrometer
Dhydrometer
When the temperature of an ideal gas is increased at constant pressure,
Athe potential energy of molecules increases
Bthe potential energy of molecules decreases
Cthe kinetic energy of molecules increases
Dthe kinetic energy of molecules decreases
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