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Physics 105 lab 2 answer key with data, Lab Reports of Physics

Physics 105 lab 2 answer key with data

Typology: Lab Reports

2021/2022

Uploaded on 02/16/2022

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PHYSICS 105
LABORATORY COVER SHEET
Section number: ___11____ Lab Instructor: ___Andrew Princer___
Date of Experiment: 4/7/2021 Name: __Rachel Simpson__
Experiment : Specific heat Partner: ________________________
Grade on the Experiment: _________
Check List for Improving Your Lab Report
Analysis incomplete
Data missing
Graphs missing
Graphs are of poor quality
Incorrect answers to questions
Missing answers to questions
Missing or unsatisfactory conclusion
Missing or unsatisfactory procedure
Missing or improper units
Late report
General appearance (stapled, torn edges, etc)
Other improvements needed: _______________
_______________________________________
_______________________________________
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PHYSICS 105

LABORATORY COVER SHEET

Section number: ___11____ Lab Instructor: Andrew Princer

Date of Experiment : 4/7/2021 Name: Rachel Simpson

Experiment : Specific heat Partner: ________________________

Grade on the Experiment: _________

Check List for Improving Your Lab Report

Analysis incomplete

Data missing

Graphs missing

Graphs are of poor quality

Incorrect answers to questions

Missing answers to questions

Missing or unsatisfactory conclusion

Missing or unsatisfactory procedure

Missing or improper units

Late report

General appearance (stapled, torn edges, etc)

Other improvements needed: _______________

_______________________________________

_______________________________________

8. Measurement of specific heat

Goal. Determine the specific heat of two metals by heat transfer. Background. A review of the physics of heat exchange can be found in your textbook. The specific heat c is a measure for how much heat 1 gram of a material can absorb until its temperature increases by 1 degree. If an object of mass M absorbs heat Q then its initial temperature T i increases to a final temperature T f according to the equation Q = M c ( T f – T i) (1) If a heated metal sample (mass M metal) of initial temperature T i,metal is placed into cold water (mass M water) with temperature T i,water, the metal will heat the water until both have the same final temperature T f,both. Since the heat gained by the water Q water and the heat lost by the metal – Q metal are identical, Q water = – Q metal, we have: M water c water ( T f,both – T i,water) = – M metal c metal ( T f,both – T i,metal) (2) This equation can be solved for the specific heat cm for the metal: (3) The values of the specific heats for the materials used in this experiment are given below: Material Specific heat c metal (cal / gC) water 1. aluminum 0. copper 0. Measurements Task 1. Prepare the water and the aluminum sample for heat transfer. Determine the mass of the (cold) water M water in the cup and its temperature T i,water. Also determine the mass of the aluminum sample M metal and heat it in boiling water T i,metal. I measured MAl = 83.4g I measured MCu = 255.7 g Ti,metal = 99.1 0 C Troom = 20.1 0 C Task 2. Carry out the heat transfer. After the temperature of the aluminum sample T i,metal has stabilized after a few

Cu Trial 1 C^1 Cu=-366.0(20.2-15.4)/255.7(20.2-99.1)=0.087cal/gC |0.087-0.092/0.092|100%=5.43% Cu Trial 2 C^2 Cu=-265.0(23.9-16.9)/255.7(23.9-99.1)=0.096cal/gC |0.096-0.092/0.092|100%=4.35% Task 5. Lab report  Suppose the original temperature T i,water of the water was far below room temperature. Would the specific heat determined by (3) be larger or smaller? Is (3) still valid in this case? The specific heat would be smaller because some heat will be released. It is still a valid case, the ratio becomes lesser value than the previous value. Include your data sheet and answers to the above questions in your report