June 13, 2011

In today's class we did pages 58, 43, 52 and 55

Page 58

1. true
2. false, thickness
3. false, closes
4. true
5. false, parallel
6. false
7. A

Page 43

1. 40 ohms
2. 3 A
3. no, the current 3A is less than 10A fuse
4. 40 ohms
5. 3A
6. No, 3A < 10A
7. 9.375 ohms
8. 12.8A
9. Yes
10. Increase value of one of the resistors

Page 52 -53

1. 2.5 ohms
2. 
   
3. 
   

b.)1 ohms ; 4W; 2A; 2V

2 ohms; 8W; 2A; 4V

c.)6 ohms; 6 W; 1 A; 6V

3 ohms, 12W, 2A, 6V

d.) 2 ohms; 4.5 W; 1.5A, 3V

2 ohms; 4.5 W; 1.5 A; 3 V

1 ohm; 9V; 3A; 3V

Page 55

1. b
2. c
3. d
4. a
5. a
6. b
7. b

JUNE 8, 2011

In today's class we did a lab experiment from the green booklet about Circuits.
The materials that you need are:

• batteries
• alligator clip.
• light bulbs
• sockets

We did two kinds circuits. Thes are Series and Parallel Ciruits.

• This is one of the kinds of the circuits that we did;
  This one is called series circuit.
• With this kind of circuit if you loosen one of the bulbs espescially the one in between, all of the lights, turned off.
  
  
• Another type of series that we did is this one.
• It is called,parallel circuit.
• With this type of circuit, when you loosen up one of the bulbs. the current will still flow and the light did not turn off.
  
  
  
  
  The next blogger will be SAI.
  
  
  
  
  
  
  
  
  

(continuation) static equilibrium problems

Today, we read lessons regarding frictional force, normal force and inclined planes from the textbook. There's an assignment on p. 196 numbers 1-4. Ms. K said that the we will a do lab on Tuesday about inclined planes.

We also answered the static equilibrium problems # 3-5.

**If you're given the mass of the object, solve first for the weight.

**Draw your triangle with its corresponding angles, then solve for the unknown side which is Ft(tensional force) in this case. Solve it by using trigonometric identies.

The next scribe is Sai