Physics unit 7 lesson 3 Questions and Answers A+
Graded (2025)
1. Sometimes .when .work .is .being .performed, .two .surfaces .rub .against .each
.other .and . is .created.: .friction
2. Kinetic .energy .is .converted .to . through .friction.: .heat
3. Solids .expand .less .than .liquids, .and .liquids .expand .less .than .gases.: .1,3,2
4. Certain .metals .expand .more .than .others .when .heated.: .true
5. When .heated, .glass .expands .a .lot.: .false
6. The .linear .expansion .coefficient .indicates .how .much .a .solid .expands .in
.length .when .heated.: .true
7. Glass' .low .linear .thermal .expansion .coefficient .is .the .reason .glass .is .used
.in .the .construction .of .thermometers.: .true
8. The .coefficient .of .volume .expansion .indicates .how .much .a .solid .expands
.when .heated.: .true
9. Which .two .materials .would .result .in .the .least .amount .of .expansion .when
. you .increase .the .temperature?: .steel .and .glass
10. Which .two .materials .would .result .in .the .most .amount .of .expansion .when
. you .increase .the .temperature?: .lead .and .aluminum
11. A .scientist .found .that .a .sample .of .metal .expands .from .26.1 .cm3 .to .26.2
.cm3when .heated .from .25 .°C .to .75 .°C. .What .would .the .coefficient .of .volume
.expansion .be .for .this .metal?: .av=7.66 .x .10^-5/°C
12. A .sample .of .brass .562cm .in .length .is .heated .from .25 .°C .to .125 .°C. .Using
.the .value ./°C, .calculate .the .change .in .length .of .the .sample.: .l=1.0678
13. A .material .with .a .volume .of .is .heated .from .15 .°C .to .100 .°C .and .its .volume
.is .now .. .What .is .the .coefficient .of .volume .expansion .of .the .material?: .av=(4.20 . x
.10^-5)
Graded (2025)
1. Sometimes .when .work .is .being .performed, .two .surfaces .rub .against .each
.other .and . is .created.: .friction
2. Kinetic .energy .is .converted .to . through .friction.: .heat
3. Solids .expand .less .than .liquids, .and .liquids .expand .less .than .gases.: .1,3,2
4. Certain .metals .expand .more .than .others .when .heated.: .true
5. When .heated, .glass .expands .a .lot.: .false
6. The .linear .expansion .coefficient .indicates .how .much .a .solid .expands .in
.length .when .heated.: .true
7. Glass' .low .linear .thermal .expansion .coefficient .is .the .reason .glass .is .used
.in .the .construction .of .thermometers.: .true
8. The .coefficient .of .volume .expansion .indicates .how .much .a .solid .expands
.when .heated.: .true
9. Which .two .materials .would .result .in .the .least .amount .of .expansion .when
. you .increase .the .temperature?: .steel .and .glass
10. Which .two .materials .would .result .in .the .most .amount .of .expansion .when
. you .increase .the .temperature?: .lead .and .aluminum
11. A .scientist .found .that .a .sample .of .metal .expands .from .26.1 .cm3 .to .26.2
.cm3when .heated .from .25 .°C .to .75 .°C. .What .would .the .coefficient .of .volume
.expansion .be .for .this .metal?: .av=7.66 .x .10^-5/°C
12. A .sample .of .brass .562cm .in .length .is .heated .from .25 .°C .to .125 .°C. .Using
.the .value ./°C, .calculate .the .change .in .length .of .the .sample.: .l=1.0678
13. A .material .with .a .volume .of .is .heated .from .15 .°C .to .100 .°C .and .its .volume
.is .now .. .What .is .the .coefficient .of .volume .expansion .of .the .material?: .av=(4.20 . x
.10^-5)
