PHY101: Elementary Mechanics, Heat &properties Of Matter TMA3

Ads

PHY101: Elementary Mechanics, Heat &properties Of Matter TMA3

Question 1 : Which of the following substances has the highest viscosity at room temperature?
A.kerosine
B.Water
C.palm oil
D.alcohol

Answer to question 1 is C. palm oil

 

Like Our Facebook page

Question 2 : A ______________ of reference is a set of coordinate axes used to describe the motion of an object.
A.geometry
B.(x, y)
C.x and y axes
D.frame

Answer to question 2 is A. geometry

 

Question 3 : One of these is an example of thermal radiation detector
A.bolometer
B.thermal glass
C.thermometer
D.thermal rod

Answer to question 2 is B. thermal glass

 

Question 4 : The mechanism of heat transfer from one point to another through vibration of the molecules of the medium is called -------------
A.radiation
B.diffusion
C.conduction
D.convection

Answer to question 4 is D. convection

 

Question 5 : ____________ point is reached when the molecules of a loaded piece of wire begin to slide past each other as it exceeds its elastic limit
A.Yield
B.Collision
C.Elastic
D.Fixed

Answer to question 5 is B. collision

Question 6 : Thermal expansion of a solid material depends on the following EXCEPT
A.the nature of the material making up the solid
B.the initial dimensions of the solid
C.the range of the temperature change
D.average translational motion of constituent atoms of the material

READ ALSO  Enugu Pastor Called Out For Allegedly Getting A 17-Year-Old Girl Pregnant, Asks Her To Abort It

Answer to question 6 is D.average translational motion of constituent atoms of the material

 

 

Question 7 : Work and moment of a force have the same _________________
A.geometry
B.dimension
C.unit
D.dimensionless

Answer to question 7 is C. unit

 

Question 8 : Quantities units which are obtained by a combination of the basic or fundamental quantities are called ___________ quantities
A.derived
B.unit
C.fundamental
D.dimesion

Answer to question 8 is A. derived

 

Question 9 : A wire of cross-sectional area of 6×10−5m2

and length 50cm stretches by 0.2mm under a load of 3000N. Calculate the Young’s modulus for the wire
A.1.25×1011Nm−2
B.8×1010Nm−2
C.2.5×1011Nm−2
D.5×1011Nm−2

 

Question 10 : In the quantity a=axi+ayj, j is the ___________ along the y-direction.
A.unit scalar
B.multiple unit
C.muttiple unit
D.unit vector

Answer to question 10 is A. unit scalar

 

Question 11 : In which of the following phenomena is surface tension important?
A.the floating of a boat in water
B.the floating of a plastic sphere in water
C.the floating of a ballon in air
D.the floating of a steel wire in water

Answer to question 11 is A. floating of a boat in water

READ ALSO  Ebola: New drug shows 90% survival

 

Question 12 : i⋅⃗i=j⋅⃗j=k⋅⃗k=_________________
A.3
B.2
C.4
D.1

Answer to question 12 is D. 1

 

Question 13 : A _______________ quantity is completely specified by its magnitude and direction
A.measurement
B.scalar
C.vector
D.dimension

Answer to question 13 is C. vector

 

Question 14 : The process whereby molecules move from the region of high concentration to that of low concentration until equilibrium is established within the system is called _________
A.adhension
B.osmosis
C.diffusion
D.cohesion

Answer to question 14 is B. Osmosis

 

Question 15 : A string of natural length L extends to a new length L' under tensile force F. If Hooke’S law applies, the work done in stretching the spring is ------------
A.12FL
B.12(f−F′)
C.(f−F′)
D.12FL′

Answer to question 15 is try it yourself

 

Question 16 : Which of these is correct about viscosity?
A.it is does not vary from one liquid to another
B.both viscous force and upthrust act upwards
C.it varies with the relative velocity of the surfaces in contact
D.it increases with increase in temperature

Answer to question 16 is C. C.it varies with the relative velocity of the surfaces in contact

READ ALSO  Body of Late Hon. Suleiman Abdulateef PA to Governor Yahaya Bello before he was buried [Photo]

 

Question 17 : One of these is NOT a basic assumption of kinetic theory of ideal gases
A.the kinetic energy of the molecules is changing continuously
B.a gas consist of a large number of molecules
C.the attraction between the molecules is negligible
D.the gas molecules are in a state of continuous random motion

Answer to question 16 is B.a gas consist of a large number of molecules

 

Question 18 : The molecules of a liquid are held together by what type of forces?
A.surface tension forces
B.cohesive forces
C.adhesive forces
D.viscosity

Answer to question 18 is try it yourself

 

Question 19 : The ___________________ of a physical quantity is the relationship between the unit of the quantity and the units of the fundamntal quantities
A.unit
B.dimensonless
C.wide
D.dimension

Answer to question 19 is D dimension

Question 20 : All motions are ___________ butnot absolute
A.relative
B.parallel
C.Perpendicular
D.inertia

Answer to question 20 is A. relative

 

 

Want To Support Us By Donating Click Here

UPDATES: DON'T FORGET TO DOWNLOAD OUR APP BELOW

vote
Article Rating

ads

Stories You May find Interesting

Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments