PHY101: Elementary Mechanics, Heat &properties Of Matter TMA4

Question 1 : Poise is the SI unit of measurement.
A. dimension
B. scalar
C. measurement
D. vector

Answer question 1 is C. measurement

Question 2 : The term ________________ defines frictional force in fluids
A. the floating of a boat in water
B. the floating of a ballon in air
C. the floating of a steel wire in water
D. the floating of a plastic sphere in water

Answer question 2 is A. the floating of a boat in water

Question 3 : Two neighbouring layers of a fluid have different velocities 4cm/s and 2cm/s respectively They are seperated by a distance of 4cm. Their average velocity gradient is _________ /s to one place of decimal
A. 3
B. 4
C. 2
D. 1

Answer question 3 is C. 2

Question 4 : ________’s principle explain the uniform or equal transmission of pressure in all directions in a fluid
A. convection
B. radiation
C. conduction
D. diffusion

Answer question 4 is A. convection

Question 5 : The coefficient of ________________ is defined as the force per unit length acting normally on one side of a line on the surface of a liquid
A. osmosis
B. adhension
C. cohesion
D. diffusion

Answer question 5 is B. tadhension

Question 6 : An object falling freely through a viscous fluid soon attains a maximum and constant velocity called ________________
A. unit
B. dimesion
C. fundamental
D. derived

Answer question 6 is D. derived

 

Question 7 : The viscous force F acting on a spherical body of radius r moving through a viscous fluid at velocity v is given as F=6πηrvF=6πηrv. This is ________’s law.
A. unit
B. dimension
C. wide
D. dimensonless

Answer question 7 is D. dimensonless

 

Question 8 : The equation P+12ρv2+ρgy=consantP+12ρv2+ρgy=consant, where ρρ stands for density, P for pressure, v for fluid velocity, g the acceleration due to gravity and y the height is _____________’s equation
A. alcohol
B. palm oil
C. kerosine
D. Water

Answer question to 8 is D. water

Question 9 : The path followed by a fluid particle in a steady flow as it travels the length of a pipe is referred to as _____________
A.(f−F′)
B.12FL
C.12FL
D.12(f−F′)

Answer question 9 is B.12FL

Question 10 : A body wholly or partially immersed in a fluid experience ____________ which is equal to the weight of the fluid displaced
A. thermometer
B. bolometer
C. thermal rod
D. thermal glass

Answer question 10 is D. thermal glass

Question 11 : A person standing close to a fast moving trai experinces suction effect. This is an application of ______________’s principle
A. muttiple unit
B. unit scalar
C. multiple unit
D. unit vector

Answer question 11 is D. unit vector

Question 12 : _________’s apparatus is used to compare the relative densities of two different liquids
A. 5×1011Nm−2
B.8×1010Nm−2
C. 1.25×1011Nm−2
D. 2.5×1011Nm−2

Answer question 12 is C. 1.25×1011Nm−2.

Question 13 : A material that can easily be drawn into a wire as it undergoes plastic deformation is said te be ____________
A. geometry
B. x and y axes
C. frame
D. (x, y)

Answer question 13 is A. geometry

Question 14 : The frictional force required to maintain a unit velocity gradient between two layers of a fluid in relative motion, each of a unit area, is the coefficient of __________.
A. unit
B. geometry
C. dimensionless
D. dimension

Answer question 13 is D. dimension

Question 15 : In the equation E = Tensile stress/tensile strain, E stands for ______________’s modulus of elasticity
A. parallel
B. relative
C. inertia
D. Perpendicular

Answer question 15 is A. parallel

Question 16 : _____________ law states that if two systems A and B are seperately in thermal equilibrium with a third system C, then they are in thermal equilibrium with each other
A. cohesive forces
B. viscosity
C. surface tension forces
D. adhesive forces

Answer question 16 is A cohesive forces

Question 17 : The term __________ flow is used to describe uniform and non-turbulent flow of a fluid, assuming the liquid is incompressible.
A. it is does not vary from one liquid to another
B. both viscous force and upthrust act upwards
C. it increases with increase in temperature
D. it varies with the relative velocity of the surfaces in contact

Answer question 17 is B. both viscous force and upthrust act upwards
 

Question 18 : _______________ distribution is concerned with the distribution molecular speeds of a given closed system at a particular temperature
A. the initial dimensions of the solid
B. the nature of the material making up the solid
C. the range of the temperature change
D. average translational motion of constituent atoms of the material

Answer question 18 is D. average translational motion of constituent atoms of the material

Question 19 : The angle of contact for clean water and clean glass is_____________.
A. Yield
B. Collision
C. Fixed
D. Elastic

Answer question 19 is B. Collision

Question 20 : The kinetic energy per degree of freedom of a molecule of a monoatomic gas can be given interms of k and T where the symbols have thier usual meaning, as KE = _________. You may choose your answer from the list:(3kT/2, kT/3, kT/2, kT)
A. the gas molecules are in a state of continuous random motion
B. the attraction between the molecules is negligible
C. the kinetic energy of the molecules is changing continuously
D. a gas consist of a large number of molecules

Answer question 18 is A. the gas molecules are in a state of continuous random motion