Friday, January 30, 2009
Specific Heat worksheet answers
1. Gold
2. Pure water
3. Silver because it has a lower specific heat, so better conductor
4. Aluminum
5. 20,920 J
6. At the same temperature, the larger mass of water contains more thermal energy
7. concrete has a lower specific heat so it heats up faster given the same energy input
8. Do this one after the calorimetry lab and it will be easy.
9. Figure this one out on your own. :)
back side
1. 323 J
2. 588 J
3. 2243 J
4. The gold would cool down fastest. It has to release only 323 J of energy to return to its original temp.
5. 711,280 J
6. 440,000 J
7. 5.6 degrees
8. 4,393,200 J
9. we will do this one next week.
Thursday, January 15, 2009
Final Exam Review Guide Answers
Final Exam Study Guide Answers.
*not all answers are on here, some excluded*
DON'T FORGET TO STUDY YOUR ASTRONOMY AS WELL!
ESPECIALLY STARS/THE SUN.
Page 1
1) a) 3
b) 5
c) 2
d) 3
e) 2
2) a) 270.00
b) 143
c) 87.2
d) 1.3 x 10^14
e) 2.0 z 10^14
f) 7 x 10^6
3) d) 7.56 x 10^-4
e) 0.0044
f) 13,000
Page 2
6) a) 10
b) 3
7) 7s
8) 7.6 m/s down
9) 1000 N
10) 1000 N
11) 25 N
12) 530 N
13) 1 x 10^-7
15) 1700 m
16) 0.9 m/s
17) 2.5 m/s
Page 3
18) force acts on it
19) momentum transferred
Page 4
2) 20 A will allow less current through
3) Same (full voltage) because it is a parallel circuit. Each device gets the full voltage of the battery.
4) 24 x 2.2= 52.6 volts
5) 4.0W/12V= o.3 amps
6) 45/0.38= 118.4 volts; V=IR so R=V/I so 118.4V/0.38= 312 ohms
7) So others remain on if one fails
Page 5
1) continous/visible spectrum
2) gamma
3)photon
4) violet
5) refraction
6) potential; kinetic
7) work; force
8) watt; joule
9) renewable
10) 4x
1) See bottom of pg. 96 in book
2) Equal
3) perpendicular for transverse; parallel for longitudinal
4) light behaves like particles
5) energy of atom executes electron and moves up level(s) as electron drops and emits photon
6) radiant- from sun
electromagnetic- em waves electric, magnetic fields
thermal- heat
nuclear- nucleus energy, sometimes particles
7)a) sound waves are longitudinal, slower, and compress matter. Light waves are electromagnetic, faster, and photons.
b)renewable- can be regrown; nonrenewable- replenishing takes 1,000,000+ years
c) work is FxD; power is W/T
Page 6
1) 67 degrees
2) 22.0 kilograms
3) 4.4 x 10^-18 joules
4) 19.3 hertz
5) 0.2 m
6) 4.75 m
7) 4.2 x 10^17 hertz
8) 1.44 x 10^18 joules
9) 15 m/s
10) 0 joules
11) 100 joules
*not all answers are on here, some excluded*
DON'T FORGET TO STUDY YOUR ASTRONOMY AS WELL!
ESPECIALLY STARS/THE SUN.
Page 1
1) a) 3
b) 5
c) 2
d) 3
e) 2
b) 143
c) 87.2
d) 1.3 x 10^14
e) 2.0 z 10^14
f) 7 x 10^6
3) d) 7.56 x 10^-4
e) 0.0044
f) 13,000
Page 2
6) a) 10
b) 3
7) 7s
8) 7.6 m/s down
9) 1000 N
10) 1000 N
11) 25 N
12) 530 N
13) 1 x 10^-7
15) 1700 m
16) 0.9 m/s
17) 2.5 m/s
Page 3
18) force acts on it
19) momentum transferred
Page 4
2) 20 A will allow less current through
3) Same (full voltage) because it is a parallel circuit. Each device gets the full voltage of the battery.
4) 24 x 2.2= 52.6 volts
5) 4.0W/12V= o.3 amps
6) 45/0.38= 118.4 volts; V=IR so R=V/I so 118.4V/0.38= 312 ohms
7) So others remain on if one fails
Page 5
1) continous/visible spectrum
2) gamma
3)photon
4) violet
5) refraction
6) potential; kinetic
7) work; force
8) watt; joule
9) renewable
10) 4x
1) See bottom of pg. 96 in book
2) Equal
3) perpendicular for transverse; parallel for longitudinal
4) light behaves like particles
5) energy of atom executes electron and moves up level(s) as electron drops and emits photon
6) radiant- from sun
electromagnetic- em waves electric, magnetic fields
thermal- heat
nuclear- nucleus energy, sometimes particles
7)a) sound waves are longitudinal, slower, and compress matter. Light waves are electromagnetic, faster, and photons.
b)renewable- can be regrown; nonrenewable- replenishing takes 1,000,000+ years
c) work is FxD; power is W/T
Page 6
1) 67 degrees
2) 22.0 kilograms
3) 4.4 x 10^-18 joules
4) 19.3 hertz
5) 0.2 m
6) 4.75 m
7) 4.2 x 10^17 hertz
8) 1.44 x 10^18 joules
9) 15 m/s
10) 0 joules
11) 100 joules
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