1. 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.

2. Friday, 10/18/2013 Physics Bellringer # 2-1
Correct the answer key to Classwork 07
1A = 70.9 N
1B = N
Find sin(x)
Find cos(x)

3. Monday, 10/21/2013 Physics Bellringer # 2-2
Draw a free body diagram
For this traffic light.

4. 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.

5. Tuesday, 10/22/2013 Physics Bellringer # 2-3
Given the crane diagram:
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?

6. 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?

7. Wednesday, 10/23/2013 Physics Bellringer # 2-4
List at least 5 key things to remember when solving vector analysis problems.

8. 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?
Why might an atom gain or lose an electron?

9. 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.

10. Friday, 10/25/2013 Physical Science Bellringer # 2-5
Describe the differences between ionic and covalent bonds.

11. 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.

12. 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.

13. 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.

14. 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.

15. 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?

16. Friday, 11/1/2013 Physical Science Bellringer
Take your seat.
Clear your desk of everything except a pencil.
Be quiet.

17. 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?

18. 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?

19. Tuesday, 11/5/2013 Physics Bellringer # 2-9
Draw the upward and downward forces at work on this bridge

20. Tuesday, 11/5/2013 Physical Science Bellringer #2-10
Balance the following chemical equation:
____ H2 + ___ OH  6H2O

21. 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.

22. 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?

23. 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?

24. Friday, 11/8/2013 Physical Science Bellringer #2-13
Turn in your bellringer book containing your bellringers thus far for this grading period.

25. Tuesday, 11/12/2013 Physics Bellringer # 2-11
List at least 4 common mistakes or things to remember when working torque problems.

26. Tuesday, 11/12/2013 Physical Science Bellringer #2-13
Describe the difference between a physical change and a chemical change.

27. 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?

28. 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?

29. Thursday, 11/14/2013 Physical Science Bellringer #2-15
Write the steps for balancing a chemical equation, then balance the following:

30. 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?

31. 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.

32. 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?

33. 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.

34. 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?

35. 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

36. 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.

37. 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?

38. Tuesday, 12/03/2013 Physics Bellringer # 2-18
Draw the free body diagram for the following

39. 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?

40. 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.

41. 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.

42. Thursday, 12/05/2013 Physical Science Bellringer #2-21
Look up the following terms and write definitions:
Nuclear fission
Nuclear fusion
Chain reaction
Transmutation

43. 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.

44. 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
How much substance is left
0 seconds
7 seconds
14 seconds
21 seconds
28 seconds
35 seconds

45. 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?

46. Tuesday, 12/10/2013 Physics Bellringer # 2-21
With a pendulum:
What happens to the period as the mass increases
What happens to the period as the length increases
With a spring:
What happens to the period as the mass increases?
What happens to the period as the spring constant increases?

47. 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.