Coefficient on Linear Expansion

Question 1

Equipment needed for the experiment

Answer 1

Coeffiecient of Linear ExpansionApparatus
Electric Stove
Meterstick
Thermometer
Steam Generator
Beaker
Rubber Tube

Question 2

Most materials expand somewhat when heated through a ____ that does not produce
a change in phase.

Answer 2

temperature range

Question 3

increases the average amplitude of vibration of the atoms in the
material which increases the average separation between the atoms.

Answer 3

heat

Question 4

formula for change in L (length)

Answer 4

ΔL = αL Δt

Question 5

in the formula, ΔL = αL Δt

α is

Answer 5

coefficient of linear expansion for the material

Question 6

in the formula, ΔL = αL Δt

Δt is?

Answer 6

temperature change

Question 7

linear thermal expansion formula

Answer 7

ΔL = αL Δt;

Question 8

example of materials that are not isotropic

Answer 8

asymmetric crystal

Question 9

its α can have different value depending on the axis along which
the expansion is measured.

Answer 9

non-isotropic material

Question 10

α can have a different value depending on the ___ along which
the expansion is measured

Answer 10

axis

Question 11

α can also vary somewhat with temperature so thatthe degree of expansion
depends not only on the magnitude of the temperature change, but on the ___temperature as
well

Answer 11

absolute

Question 12

what α is measured in the experiment

Answer 12

copper
aluminum
brass

Question 13

formula of length of change in the experiment

Answer 13

ΔL=(FR-IR)(a/b)

Question 14

experimental value of coefficient of linear expansion of metal equation

Answer 14

α = ∆L/Lo∆t

Question 15

refers to the phenomenon where the dimensions of materials change as a
result of temperature variations

Answer 15

thermal expansion

Question 16

Most substances ____when heated and ___when cooled.

Answer 16

expand
contract

Question 17

, refers to the change in one dimension (length) of a solid object.

Answer 17

linear expansion

Question 18

is a material-specific value that quantifies how much a
material’s length changes with a change in temperature.

Answer 18

e coefficient of linear expansion

Question 19

coefficient of linear expansion is denoted by what greek symbol

Answer 19

α

Question 20

defined as the fractional change in
length per degree of temperature change:

Answer 20

coefficient of linear expansion

Question 21

Expansion joints are placed between sections of ___ tracks to prevent buckling during hot weather.

what real-word application

Answer 21

rail way tracks

Question 22

Expansion joints are also used in ____to allow for thermal expansion and
contraction of the materials.

what real world example

Answer 22

bridges

Question 23

Bimetallic strips, which consist of two metals with different coefficients of
expansion, are commonly used in temperature control devices.

what real world example

Answer 23

thermostats

Question 24

factors affecting linear expansion (3)

Answer 24

Material
Temperature Change
Initial length

Question 25

Different materials have same coefficients of linear expansion

T/F

Answer 25

False

Question 26

which expands more, metal or ceramics/glass?

Answer 26

metal

Question 27

: A larger temperature difference causes a greater expansion

T/F

Answer 27

True

Question 28

Longer objects will experience more significant changes in length.

T/F

Answer 28

True

Question 29

aluminum road has an initial length of 50 cm at room temp of 25 degrees celsius

after heating, the final length is 50.05 cm and the water temp is 100 degrees celsius

find a

Answer 29

1.33x10^-5 per oC