Sig Figs
How many significant figures or digits are in the following:
0.000004568m
4
Express the following number in exponential form using scientific notation:
0.000328
3.28 x 10^-4
Define accuracy
Solve for "s"
ay/x = cb/s
s= xcb/ay
How many significant figures or digits are in the following:
6.7 x 10^7kg
2
Write the following in "long form"
7.1957 x 10^-4
0.00071957
The degree of exactness to which the measurement of a quantity can be reproduced is what?
Precision
Solve for 't'
v = v0 + at
t = v-v0/a
Perform the calculation:
0.0065kg x 3.209kg
0.021 kg^2
What are the rules for exponents when moving the decimal?
If the exponent is positive, you move the decimal to the right
If the exponent is negative, you move the decimal to the left
What is an independent variable?
The variable that is changed or manipulated by the experiment.
Solve for 'v'
a = v/t
v = at
Perform the calculation
0.6444cm + 2.68cm + 0.27854cm
3.60cm
What are the rules for the exponents when multiplying or dividing in scientific notation?
Multiplying = adding exponents
Dividing = subtracting exponents
Depenedant variable
Solve for 'd'
v^2 = v0^2 + 2ad
d = v^2 - v0^2 / 2a
List the sig fig rules
1. nonzero digits are always significant
2. all final zeros after the decimal point are significant
3. zeros between two significant digits are significant (sandwich rule)
4. zeros used as placeholders are NOT significant (leading and following zeros)
What are the steps when adding or subtracting using scientific notation?
1. Make sure the exponents are the same.
2. If exponents are not the same, moving the decimal to the left increases the exponent, moving the decimal to the right decreases the exponent.
3. Answer is in proper form, which is when the expression contains only ONE DIGIT to the LEFT of the DECIMAL.
Draw the graph form of a linear relationship, quadratic relationship, and inverse relationship.
Linear (straight line) Quadratic (U shape/parabola), inverse (opposites curved)
Solve for 'a'
d= 1/2at^2
a= 2d/t^2