# Random Revision

What is the fetch - decode - execute cycle?
The instruction is fetched from memory, decoded by the cpu and executed by the arithmetic and logic unit, the counter is incremented then it moves onto the next instruction
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What is a variable?
A piece of data that can be changed
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What is a constant?
A piece of data that stays the same
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What is a boolean?
A piece of data that can have 2 values
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Name 3 inputs
Mouse, Keyboard, Microphone Ect.
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Name 3 outputs
Monitor, Speaker, Plotter Ect.
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What is base 2 also known as?
Binary
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Name 3 storage devices
Optical disk, magnetic drive, flash drive Ect.
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What would be the result of: n = 3 // if n == 4: // print("True") // else: // print("False")
False
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What is case?
A quicker if , else, in some programming languages
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Equation for kinetic energy
Ek = 1/2 mass * velocity ^ 2
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Equation for gravitational potential
Gpe = Height * Mass * Gravity
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Ohms law
V = IR
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Equation for efficiency
Efficiency = (Useful output / Total Input ) * 100
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Cosine Length of Side
a ^ 2 = b ^ 2 + c ^ 2 - 2ab Cos A
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Cosine Angle
Cos A = (b^2 + c^2 - a^2) / 2bc
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Sine Rule
a / Sin A = b / Sin B = c / Sin C
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## Other cards in this set

### Card 2

#### Front

What is a variable?

#### Back

A piece of data that can be changed

### Card 3

#### Front

What is a constant?

### Card 4

#### Front

What is a boolean?

Name 3 inputs