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
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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
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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
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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
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When salt is added to water, its boiling point
Aincreases
Bdecreases
Cremains unaffected
Dmay increase/decrease dependingon the pressure
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Which one of the ff propagates with the same speed as speed of light?
Asound waves
Bheat waves
Cshock waves
DBeta rays
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The surface of the thermos flask is silvered for minimizing heat transfer by what process?
Aconduction
Bradiation
Cconvection
Dvaporization
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The scientist who systematically demonstrated the equivalence of mechanical energy and heat was
AJoule
BBoltzmann
CFaraday
DKelvin
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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
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The instrument, which measures temperature by radiation, is called
Athermopile
Bthermometer
Cpyrometer
Dhydrometer
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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
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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
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When common salt is sprinkled on ice, the temperature of ice
Aincreases
Bdecreases
Cremains unchanged
Dnone of these
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What is an elemental unit of energy?
AQuartz
BQuark
CPhoton
DQuantum
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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
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The size of the largest atom is in the order of _______
Acentimeter
Bmillimeter
Cnanometer
Dmicrometer
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The mass of a grain salt is in the order of ________
Amilligram
Bgram
Cmicrogram
Dnanogram
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The scalar product of two perpendicular vectors is always ________
Aequal to 1
Bgreater than 1
Cless than 1
Dequal to 0
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The vector product of two parallel or antiparallel vectors is always ________
Aequal to 1
Bgreater than 1
Cless than 1
Dequal to 0
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The vector product of any vector with itself is _______
