## Tuesday, February 3, 2009

### Speed and Acceleration Equations - 5:08

KEY CONCEPTS:

These pyramids need to be memorized. Simple way to remember the equations for speed and acceleration

Labels:
acceleration,
distance,
Papapodcasts,
physics,
speed,
time

## Monday, February 2, 2009

## Sunday, February 1, 2009

### Significant Digits

Key Concepts:

Be careful with zeros. Zeros in between non-zero numbers are significant. Zeros after the decimal are significant ONLY IF they FOLLOW any OTHER number.

Examples:

a.) 4000000 - has 1 significant digit (the zeros are there as place values showing size of the number)

b.) 95.00 - has 4 significant digits (we DON'T need those zeros because without them the value remains the same, HOWEVER, by us including those zeros we MAKE THEM SIGNIFICANT)

c.) 0.00003 - has 1 significant digit (zeros in front of the three are only there as place values. Without them the value of the number changes)

Labels:
accuracy,
Papapodcasts,
physics,
precision,
science,
significant digits

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