daily sprint 1)a water tank is filled with 2000 gallons of water. each day, 4% of the water...
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Daily Sprint1) A water tank is filled with 2000 gallons of
water. Each day, 4% of the water evaporates. No water is added to the tank. To the nearest gallon, which list best represents the water levels in the tank for the first five days?
A) 2000, 1920, 1840, 1760, 1680B) 2000, 1920, 1843, 1769, 1698C) 2000, 1992, 1984, 1976, 1968D) 2000, 1996, 1992, 1988, 1984
(show your work)
START
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Design Squad
1. Pull out a blank sheet of paper
2. Fold the sheet into 4 quadrants
3. Label the boxes on the front 1 – 4
4. Label the boxes on the back 5 – 8
5. Write one step of the design process in each box (1-8)
6. As we watch the video, fill in notes for each step you see being performed.
(If I see good work, you will receive extra credit)
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Logic Gates
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Logic Gates
• Digital Signals
• Logic Gates
• NOT (Inverter) Gate
• AND Gate
• OR Gate
• NAND Gate
• NOR Gate
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Digital SignalsDigital signals 0 (false) or 1 (true)
Digital signal 1 is represented by a small voltage.
Digital signal 0 is represented by no voltage.
Digital Waveforms
Each column represents a small amount of time
1 (3V)
0 (0V)
1 0 0 1 0 1 1 0
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Logic GatesAn electronic system that performs
a logical operation on an input signal
Gates process digital inputs to produce digital outputs.
How do computer processors make decisions? How do they do math? Display images? Etc.?
LOGIC
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10
NOT (Inverter) Gate
A logic gate that changes its input logic level to the opposite state
Symbol
01Truth Table: A table listing all possible inputs to a circuit and the corresponding outputs
Truth Table
NOT Gate
Input (A) Output (Y)
A Y
0 1
1 0
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Logic Word Problems
• If I am hungry and it is 5:00 p.m., then I will eat dinner.
• If I pedal harder or go downhill, then my bike will go faster.
• If it is windy and cold, then I am not going to walk home.
• If my battery is dead or I forget headphones, then I cannot listen to my music.
Each word problem uses the same logic as a common gate.
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AND Gate
If I am hungry AND it is 5:00 p.m., then I will eat dinner.
A logic circuit whose:Inputs both = 1 then,Output = 1Symbol
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10 001 011 100 0
AND Gate
Truth Table
AND Gate
Input (A) Input (B) Output (Y)
A
B
0 00
Y
0 01
1 00
1 11
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OR Gate
If I pedal harder OR go downhill, then my bike will go faster.
A logic circuit when:Either Input = 1 then,Output = 1Symbol
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00 010 101 111 1
OR Gate
Truth Table
OR Gate
Input (A) Input (B) Output (Y)
A
B
0 00
Y
0 11
1 10
1 11
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NAND Gate
If it is windy AND cold, then I am NOT going to walk home.
A logic circuit whose:Inputs both = 1 then,Output = 0Symbol
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00 110 101 111 0
NAND Gate
Truth Table
NAND Gate
Input (A) Input (B) Output (Y)
A
B
0 10
Y
0 11
1 10
1 01
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NOR Gate
If my battery is dead OR I forget headphones, then I will NOT listen to my music.
A logic circuit when:Either Input = 1 then,Output = 0Symbol
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00 110 001 011 0
NOR Gate
Truth Table
NOR Gate
Input (A) Input (B) Output (Y)
A
B
0 10
Y
0 01
1 00
1 01
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Logic Gates
• Digital Signals
• Logic Gates
• NOT (Inverter) Gate
• AND Gate
• OR Gate
• NAND Gate
• NOR Gate
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Image Resources
Microsoft, Inc. (2008). Clip Art. Retrieved September 10, 2008, from http://office.microsoft.com/en-us/clipart/default.aspx