CHAPTER 1 PHYSICS Flashcards
1
Q
Name all prefixes and their SI units
A
- Terameter: 10(12)m
- Gigameter: 10(9)m
- Megakelvin: 10(6)K
- Kilometer: 10(3)m
- centimeter: 10(-2)m
- millisecond: 10(-3)s
- microsecond: 10(-6)s
- nanosecond: 10(-9)s
2
Q
What are the four types of object measurements?
A
- size of an atom.
- size of a hair.
- size of radius of earth.
- size of diameter of earth.
3
Q
What are the object measurements?
A
- size of an atom: 10(-10)m
- size of a hair: 10(-4)m
- size of radius of earth: 10(6)m
- size of diameter of earth: 10(7)m
4
Q
Name the base units and their SI units
A
- electric current: ampere(A)
- temperature: kelvin(K)
5
Q
What are the instruments used to measure length and what are they used for?
A
- measuring ruler: height.
- digital calipers: diameter of bigger objects, eg. test tubes.
- micrometer screw gauge: diameter of smaller objects, eg. piece of thin wire.
6
Q
What is a period?
A
period = time for one oscillation
7
Q
State an example of a period
A
R->S->T->S->R
8
Q
What causes a longer period?
A
- longer period length.
- greater gravitational field strength.
9
Q
What is a scalar quantity?
A
has magnitude only
10
Q
What is a vector quantity?
A
has magnitude & direction
