1. Working as a physicist Flashcards
What are 4 base SI quantities?
Mass (Kg)
Length (m)
Time (s)
Current (A)
Temperature (K)
Amount of substance (mol)
Luminous intensity (cd)
What is the standard form and symbol of tera?
10^12 T
What is the standard form and symbol of giga?
10^9 G
What is the standard form and symbol of mega?
10^6 M
What is the standard form and symbol of kilo?
10^3 k
What is the standard form and symbol of centi?
10^-2 c
What is the standard form and symbol of milli
10^-3 m
What is the standard form and symbol of micro?
10^-6 μ
What is the standard form and symbol of nano?
10^-9
What is the standard form and symbol of pico?
10^-12
What is the standard form and symbol of femto?
10^-15
Name three ways to reduce random errors.
Take 3 repeats and calculate a mean.
Use computers to reduce human error.
Use correct equipment to reduce uncertainty due to resultion of equipment.
Name three ways to reduce systematic error. (hint: rad, measuring vol,dist)
Calibrate apparatus by measuring a known value.
Correct for background radiation.
Read at eye level to reduce parallax error.
Define systematic errors.
An error having a non-zero mean, so that its effect is not reduced when observations are averaged
Define random errors.
An error in measurement caused by factors which vary from one measurement to another.
