Thursday, 10/17/2013
Physical Science Bellringer # 2-1
List at least 5 terms, topics, or concepts that you feel
like you need the most review on before Friday’s test.
Friday, 10/18/2013
Physics Bellringer # 2-1
Correct the answer key to Classwork 07
• 1A = 70.9 N
• 1B = 169.5 N
•
•
Find sin(x)
Find cos(x)
Monday, 10/21/2013
Physics Bellringer # 2-2
Draw a free body diagram
For this traffic light.
Monday, 10/21/2013
Physical Science Bellringer # 2-2
In your own words, define “stability”, and how it
applies to elements in the periodic table.
Tuesday, 10/22/2013
Physics Bellringer # 2-3
Given the crane diagram:
1.
2.
3.
In what direction(s) are the component forces
of cable A directed?
In what direction(s) are the component forces
of boom B directed?
In what direction is the 500N weight
directed?
Tuesday, 10/22/2013
Physical Science Bellringer # 2-3
What makes an atom stable?
What makes an atom unstable?
Name 3 ways that an atom can change and become
more stable?
Wednesday, 10/23/2013
Physics Bellringer # 2-4
List at least 5 key things to remember when
solving vector analysis problems.
Wednesday, 10/23/2013
Physical Science Bellringer # 2-4
When an atom loses an electron, what is it called?
What type of charge does the resulting atom have?
When an atom gains an electron, what is it called?
What type of charge does the resulting atom have?
Why might an atom gain or lose an electron?
Friday, 10/25/2013
Physics Bellringer # 2-5
•
•
•
•
•
Draw a coordinate system.
Draw a vector with magnitude 10g at 15 degrees
Draw another vector with magnitude 30g at 150
degrees
Estimate and draw the resultant vector from
the addition of those two vectors.
Draw an “equilibrant” vector that is equal in
length but opposite in direction from the
resultant.
Friday, 10/25/2013
Physical Science Bellringer # 2-5
Describe the differences between ionic and covalent
bonds.
Monday, 10/28/2013
Physical Science Bellringer # 2-6
Write the chemical formulas for the following:
• Sodium oxide
• Magnesium chloride
• Magnesium Nitride
Be sure to use the oxidation numbers to arrive at the
correct subscripts.
Wednesday, 10/30/2013
Physical Science Bellringer # 2-7
Describe the steps for naming a binary ionic
compound.
Choose a metal from group 1 or 2 and a nonmetal from
group 16 or 17, write the formula for the compound,
and then name the compound.
Thursday, 10/31/2013
Physics Bellringer # 2-6
•
•
•
•
•
•
•
•
Using the same vectors from last Friday’s bellringer:
Vector A has a magnitude 10g at 15 degrees
Vector B has a magnitude 30g at 150 degrees
Calculate the x and y components of vector A
Calculate the x and y components of vector B
Add the x components. This is the x component of
the resultant.
Add the y components. This is the y component of
the resultant.
Use the pythagorean theorem to calculate the
magnitude of the resultant.
Thursday, 10/31/2013
Physical Science Bellringer # 2-8
•
List the 3 topics from this chapter (20) that
have you the most concerned and explain why.
Friday, 11/1/2013
Physics Bellringer # 2-7
•
•
In your own words, define “torque”.
What are two things that you can do to increase
torque?
Friday, 11/1/2013
Physical Science Bellringer
•
•
•
Take your seat.
Clear your desk of everything except a pencil.
Be quiet.
Monday, 11/4/2013
Physics Bellringer # 2-8
•
If the force applied is 2N and the length of the
lever is 5m, what is the magnitude of the
torque?
If the same 2N force is
applied at a 30 degree angle
as shown, what is the
magnitude of the torque?
•
Monday, 11/4/2013
Physical Science Bellringer #2-9
•
•
What law states that matter can neither be
created nor destroyed?
When a 20 pound log burns and leaves 1 pound of
ashes, what happens to the other 19 pounds?
Tuesday, 11/5/2013
Physics Bellringer # 2-9
•
Draw the upward
and downward
forces at work
on this bridge
Tuesday, 11/5/2013
Physical Science Bellringer #2-10
•
Balance the following chemical equation:
•
____ H2 + ___ OH  6H2O
Wednesday, 11/6/2013
Physics Bellringer # 2-10
•
•
Identify a good
spot to define
the fulcrum.
What are the
torque forces at
work. Assume
the boom is 10m
long.
Wednesday, 11/6/2013
Physical Science Bellringer #2-11
•
•
•
State the law of conservation of mass.
Write the steps for balancing a chemical
equation.
How does the law of conservation of mass apply
to balancing a chemical equation?
Thursday, 11/7/2013
Physical Science Bellringer #2-12
•
•
•
•
•
•
What does an oxidation number tell us?
What types of elements are involved in an ionic
compound? (metals, nonmetals, …)
What types of elements are involved in a
covalent compound? (metals, nonmetals, …)
What is the criss-cross method for writing a
chemical formula?
Given the formula, how do I name a covalent
compound?
Given the formula, how do I name an ionic
compound?
Friday, 11/8/2013
Physical Science Bellringer #2-13
•
Turn in your bellringer book containing your
bellringers thus far for this grading period.
Tuesday, 11/12/2013
Physics Bellringer # 2-11
•
List at least 4 common mistakes or things
to remember when working torque
problems.
Tuesday, 11/12/2013
Physical Science Bellringer #2-13
•
Describe the difference between a physical
change and a chemical change.
Wednesday, 11/13/2013
Physical Science Bellringer #2-14
•
•
•
List and describe the 5 types of chemical
reactions.
Which 2 types of reactions are the opposite of
each other?
Which type of reaction is your favorite and
why?
Thursday, 11/14/2013
Physics Bellringer # 2-12
•
•
•
•
•
In your own words, define friction?
What causes friction?
What can increase friction?
What can decrease friction?
In what direction does friction act?
Thursday, 11/14/2013
Physical Science Bellringer #2-15
•
Write the steps for balancing a chemical
equation, then balance the following:
Friday, 11/15/2013
Physics Bellringer # 2-13
•
How can you tie the friction formulas used
yesterday to the kinematic formulas we
have used previously?
Friday, 11/15/2013
Physical Science Bellringer #2-16
•
•
•
•
Can you eat a phosphate?
Wash your car with a carbonate?
Brush your teeth with a sulfate?
Guess answers to these questions. Then,
list 2 or 3 chemicals that you experience in
everyday objects.
Monday, 11/18/2013
Physics Bellringer # 2-14
•
•
•
What are the forces of friction in this
diagram?
In what direction are the frictional
forces?
What influences the magnitude of the
frictional forces?
Monday, 11/18/2013
Physical Science Bellringer #2-17
•
•
If you haven’t already, identify a partner
to work with on the chemical reaction
project
If you haven’t already, begin discussions
with your partner on what chemical
reaction you want to use for your project.
Thursday, 11/21/2013
Physics Bellringer # 2-15
•
If the coefficient of
friction, m is not zero.
• Draw the free body
diagram for this
box.
• Will it accelerate
down the ramp?
• Will it remain in
place?
• Why?
Friday, 11/22/2013
Physics Bellringer # 2-16
•
Assume that the mass
will slide down the
ramp. Draw the free
body diagram, including
the frictional force
Tuesday, 11/26/2013
Physics Bellringer # 2-17
•
•
•
What is the easiest thing to understand about
friction?
What is the most difficult concept about
friction?
List at least 5 key concepts, rules, or common
mistakes that you need to remember to do
well when working on friction problems.
Monday, 12/02/2013
Physical Science Bellringer #2-18
•
•
List 3 things that you learned while
working on the chemical reactions project.
When you hear the term “nuclear”, what
thoughts come to mind? Why?
Tuesday, 12/03/2013
Physics Bellringer # 2-18
•
Draw the free body diagram for the following
Tuesday, 12/03/2013
Physical Science Bellringer #2-19
•
•
•
•
Does strong force care about the charge
of the particles?
Does electrical force care about the
charge of the p`articles?
How much stronger than electrical force is
strong force?
Can wearing a hat made of aluminum foil
protect you from radiation?
Wednesday, 12/04/2013
Physical Science Bellringer #2-20
•
•
•
Define half-life
If I start with 40kg of a radioactive
substance, and it has a half-life of 3 days, how
much will remain after:
• 3 days
• 6 days
• 9 days
• 12 days
What percentage of the original amount is
present after 12 days? Express as a fraction.
Wednesday, 12/05/2013
Physics Bellringer # 2-19
•
•
•
When you are riding/driving a car and you
accelerate, in what direction in your seat are
you “forced”?
When you are driving around a curve, in what
direction are you forced?
What does this tell you about the direction of
the acceleration while travelling in a circular
direction.
Thursday, 12/05/2013
Physical Science Bellringer #2-21
•
•
•
•
•
Look up the following terms and write
definitions:
Nuclear fission
Nuclear fusion
Chain reaction
Transmutation
Friday, 12/05/2013
Physics Bellringer # 2-20
•
•
F=ma, as always
Given the formula for centripetal acceleration
learned yesterday, what would you think the
formula for centripetal force would be. Write
the formula.
Friday, 12/06/2013
Physical Science Bellringer #2-22
•
Complete the following table. You start
with 64 g of a radioactive substance and it
has a half life of 7 seconds:
Time
0 seconds
7 seconds
14 seconds
21 seconds
28 seconds
35 seconds
How much substance is
left
Monday, 12/09/2013
Physical Science Bellringer #2-23
•
•
•
•
•
•
•
What is an alpha particle?
What nuclear process creates an alpha
particle?
What is the mass of an alpha particle (in amus)
What is a beta particle?
When is a beta particle created
How are alpha and beta particles similar?
Which is larger, an alpha or a beta particle?
Tuesday, 12/10/2013
Physics Bellringer # 2-21
•
•
With a pendulum:
• What happens to the
increases
• What happens to the
increases
With a spring:
• What happens to the
increases?
• What happens to the
constant increases?
period as the mass
period as the length
period as the mass
period as the spring
Tuesday, 12/10/2013
Physical Science Bellringer #2-24
•
•
•
What is the difference between nuclear
fission and fusion?
Draw a diagram depicting fission.
Draw a diagram depicting fusion.