Physics Chapter 1
only magnitude
A scalar quantity has
meter
SI unit of length
kilogram
SI unit of mass
second
SI unit of time
kilogram
The only SI standard represented by material standard is the
10^9
The prefix giga- means
10^-6
The prefix micro means
system of units
a group of standard units and their combinations
both direction and magnitude
a vector quantity has
derived units
combinations of base units
base units
defined by standards
7
how many base units are there in the SI
metric
major systems of units
International System of Units (SI)
modern version of the metric system
measured numbers
numbers obtained from measurement processes and thus generally have some degree of uncertainty of error
exact numbers
numbers without an uncertainty or error
standard units
official accepted units
mass
the amount of space the object occupies; same no matter what; measured in kg
weight
the force due to gravitational pull on an object; depending where you are; measured in lbs or newtons
unit analysis
using units to check equations
greater than or equal to
what can be said about average speed relative to the magnitude of the average velocity
greater than or equal to
what can be said about distance traveled relative to the magnitude of displacement
weight
which of the following is not an SI base quantity: mass, weight, length, time
kilogram
which of the following is the SI base unit for mass: pound, gram, kilogram, ton
