Chapter 1: Basic Math Review Flashcards
Notes from class, example problems, homework problems
Physical quantities are expressed with _______ and _____
Numbers / Units
What is the abbreviation for “Mega”?
M
What is the abbreviation for Kilo?
k
What is the abbreviation for Centi?
c
What is the abbreviation for milli
m
What is the abbreviation for micro
mu
What is the abbreviation for nano?
n
What is the value of M?
Million / 10^6
What is the value of k?
1,000 / 10^3
What is the value of centi?
0.01 / 10^-2
What is the value of milli?
0.001 / 10^-3
What is the value of micro?
10^-6
What is the value of nano?
10^-9
What is the method for converting units?
Multiply by 1 and ensure old units are canceled away
What does SOH-CAH-TOA stand for?
Sin = opp/hyp
Cos = adj/hyp
Toa = opp/adj
Define vector
A quantity with a direction and a strength (magnitude)
T/F: The magnitude of a vector is always a positive number.
True
What is the difference between distance and displacement?
Distance is the total amount travleded while displacement is the amount moved from start to finish.
Ex: A swimmer swim laps of a 50ft pool. They swim 6 times. Their distance is (50x6) but their displacement is 0.
How many significant figures does 2.0 have?
2
How many significant figures does 2.02 have?
3
How many significant figures does 2.020 have?
4 (any 0 past a decimal point is significant)
How many significant figures does 0.202 have?
- (Leading 0’s are never significant)
How many significant figures does 202ō
4 (A line above the last number means that number is measured and therefore significant)
How many signifiant figures does 20ō0 have?
3 (since the 0 with a line above it is the last measured number, the 0 after it is considered “rounding” and therefore NOT significant)