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Chem Quick Quiz 9-20-10
Use Dimensional analysis to convert 60 miles to
centimeters meters (Hint: 1 Inch = 2.54cm).
Please be sure to show your work using correct sig
figs and scientific notation.
Notes
Go over
Exam Part 2
Use Dimensional analysis(what I have been showing you the last two
days) to 22.5 meters to feet (Hint: 1 Inch = 2.54cm). Put into proper
format.
Known and Unknown
60 miles = ? cm
Find conversion Factors
5280 feet = 1 mile
1 inch = 2.54 cm
12 inches = 1 foot
Convert meters to cm
60 miles
x
1
5280 ft.
Convert cm to inches
316,800 ft.
x
1
12 in.
= 316,800 ft
1 mile
= 3,801,600 in.
1 ft.
Convert inches to feet
3,801,600 in.
2.54 cm.
x
1
1 in.
= 9,656,064 cm.
9.7 x 106 cm
Go over Exam Part 2
Physics Quick Quiz 9-20-10
Use Dimensional analysis to convert 60 miles to
centimeters meters (Hint: 1 Inch = 2.54cm).
Please be sure to show your work using correct sig
figs and scientific notation.
Go over Exam Part 2
Use Dimensional analysis(what I have been showing you the last two
days) to 22.5 meters to feet (Hint: 1 Inch = 2.54cm). Put into proper
format .
Known and Unknown
60 miles = ? cm
Find conversion Factors
5280 feet = 1 mile
1 inch = 2.54 cm
12 inches = 1 foot
Convert meters to cm
60 miles
x
1
5280 ft.
Convert cm to inches
316,800 ft.
x
1
12 in.
= 316,800 ft
1 mile
= 3,801,600 in.
1 ft.
Convert inches to feet
3,801,600 in.
2.54 cm.
x
1
1 in.
= 9,656,064 cm.
9.7 x 106 cm
Go over Exam Part 2
Chem Quick Quiz 9-21-10
Neutrons— an elementary particle having no charge, mass slightly
greater than that of a proton
Protons— a positively charged elementary particle that is a
fundamental constituent of all atomic nuclei
Electrons— an elementary particle that is a fundamental constituent of
matter, having a negative charge, and existing independently or as the
component outside the nucleus of an atom.
Nucleus— the dense central portion of an atom, composed of protons
and neutrons.
Dalton’s Atomic Theory— the first theory to relate chemical changes to
events at the atomic level.
Objective: Use your algebra knowledge to solve problems in scientific notation, significant
figures and metric units.
Physics Quick Quiz 9-21-10
distance - physical length; a scalar quantity which refers to how much
ground an object has covered during its motion.
acceleration - the rate of change of velocity over time.
time - the measured or measurable period during which an action,
process, or condition exists or continues.
displacement - a change in position; ∆d = d2 – d1
velocity - the rate of change of displacement over time; the ratio of
motion in a particular direction; the distance traveled divided by the
time taken.
free fall - the motion of a falling object that is influenced only by gravity.
Objective: Learn that Scientific inquiry follows general and specific investigative procedures to
produce valid data for drawing conclusions.
Chem Quick Quiz 9-22-10
Atom— the smallest particle of an element that retains the properties
of that element
Valence electrons— electrons on the outer most shell.
Atomic number— the number of positive charges or protons in the
nucleus of an atom of a given element.
Mass number— the total number of protons and neutrons in the
nucleus of an atom.
Atomic mass— the number of positive charges or protons in the nucleus
of an atom of a given element.
Atomic mass unit (amu)— a unit of mass equal to one-twelfth the mass
of a carbon-12 atom.
Objective: Use your algebra knowledge to solve problems in scientific notation, significant
figures and metric units.
Physics Quick Quiz 9-22-10
speed - the rate at which an object covers distance; a scalar quantity
which refers to how fast an object is moving.
average speed – the total distance over a period of time.
instantaneous speed – how fast an object is going at a certain time
variable – a symbol that is used to represent a value that can change
independent variable – the variable that can be manipulated by the
experimenter
dependent variable – the variable that is changed when the
independent variable is changed.
magnitude –
scalar – a quantity that has just magnitude
vector – a quantity with magnitude and direction
Objective: Use your algebra knowledge to solve problems in scientific notation, significant
figures and metric units.
Chem Quick Quiz 9-23-10
Objective: Use your algebra knowledge to solve problems in scientific notation, significant
figures and metric units.
Physics Quick Quiz 9-23-10
Objective: Use your algebra knowledge to solve problems in scientific notation, significant
figures and metric units.
Chem Quick Quiz 9-21-10
neutrons - an elementary particle having no charge, mass slightly
greater than that of a proton
protons - a positively charged elementary particle that is a fundamental
constituent of all atomic nuclei.
electrons - an elementary particle that is a fundamental constituent of
matter, having a negative charge, and existing independently or as the
component outside the nucleus of an atom.
valence electrons - electrons on the outer most shell
electron configuration- the arrangement of electrons around the
nucleus of an atom in its ground state
molecular structure - is the three- dimensional arrangement of the
atoms that constitute a compound.
Objective: Use your algebra knowledge to solve problems in scientific notation, significant
figures and metric units.
Chem Quick Quiz 9-21-10
Linear molecules – atoms arranged in such a way that
they are in or resemble being in a line
Trigonal planar - is a molecular geometry model with
one atom at the center and three atoms at the corners
of a triangle
Tetrahedral - molecule in which a central atom forms
four bonds which are directed toward the corners of a
regular tetrahedron
Objective: Use your algebra knowledge to solve problems in scientific notation, significant
figures and metric units.