PHYSICS 112 LAB FINAL QUESTIONS AND VERIFIED
ANSWERS
In Lab 1 Electrostatic Forces, you investigated the electrostatic force between two
objects. Why was it not possible to repeat your measurements several times and then
average the results? - Answers - It was not possible to repeat our measurements
several times because repeating the experiment would automatically give a new and
different data set, since the charge inevitably would be different. No way to measure the
charge being transferred. weather conditions also affected measurements as the lab
was supposed to be done outside.
water and glass experiment (lab 8: refraction) what did the pins help you do? - Answers
- see the refraction of light going from air to glass and air to water
Lab 2 (solenoids): why would leaving the voltmeter on not change the... - Answers - if
voltmeter is left on, then the needle would move the opposite side
lab 10 (wavelengths of light) what is the relationship between wavelength and color? -
Answers - wavelength increases from violet to red
lab 14 (radioactive decay) what is the theoretical value of decay constant? - Answers -
0.005 s^-1 due to lambda=1/(So+No)
conclusion of sample lab? - Answers - voltage is inversely related to current according
to ohm's law: V=RI
percent error for lab? - Answers - 4%
micrometer estimation - Answers - between 40s or 50s
variables for sample lab? - Answers - independent: current (I)
dependent: voltage (v)
control: resistance (r)
graph for sample lab? - Answers - current on x axis
voltage on y axis
title: dependent vs independent
ohms law equation - Answers - V=RI
theoretical slope equation/numerical value - Answers - vxr=1
for curved graph how to linearize trendline - Answers - x^1/2
ANSWERS
In Lab 1 Electrostatic Forces, you investigated the electrostatic force between two
objects. Why was it not possible to repeat your measurements several times and then
average the results? - Answers - It was not possible to repeat our measurements
several times because repeating the experiment would automatically give a new and
different data set, since the charge inevitably would be different. No way to measure the
charge being transferred. weather conditions also affected measurements as the lab
was supposed to be done outside.
water and glass experiment (lab 8: refraction) what did the pins help you do? - Answers
- see the refraction of light going from air to glass and air to water
Lab 2 (solenoids): why would leaving the voltmeter on not change the... - Answers - if
voltmeter is left on, then the needle would move the opposite side
lab 10 (wavelengths of light) what is the relationship between wavelength and color? -
Answers - wavelength increases from violet to red
lab 14 (radioactive decay) what is the theoretical value of decay constant? - Answers -
0.005 s^-1 due to lambda=1/(So+No)
conclusion of sample lab? - Answers - voltage is inversely related to current according
to ohm's law: V=RI
percent error for lab? - Answers - 4%
micrometer estimation - Answers - between 40s or 50s
variables for sample lab? - Answers - independent: current (I)
dependent: voltage (v)
control: resistance (r)
graph for sample lab? - Answers - current on x axis
voltage on y axis
title: dependent vs independent
ohms law equation - Answers - V=RI
theoretical slope equation/numerical value - Answers - vxr=1
for curved graph how to linearize trendline - Answers - x^1/2
