Vocabulary
Define "physics."
The study of interactions between matter and energy.
BONUS! 600 points!
Define "equation"
A set of symbols summarizing a mathematical sentence
How many sig figs does the following number have?
1001
4
What does the prefix "kilo" mean?
One thousand
BONUS! 400 points!
Rearrange the following equation to have a statement about time:
speed = distance/time
time = distance/speed
Define "mass"
The amount of matter in an object.
The amount of inertia an object has.
What is the difference between "mass" and "weight"?
Mass does not change.
Weight is a measure of the pull of gravity on an object. Changes from planet to planet.
BONUS! 400 points!
Put the following number into scientific notation:
437.98
4.3798 x 10^2
What does the prefix "milli" mean?
One thousandth
What is the official temperature of the SI?
Kelvin
Define "volume"
The amount of space that matter takes up.
What is the difference between "accuracy" and "precision"?
Accuracy is how closely a measurement reflects the actual value.
Precision refers to how close measurements are to each other. (pg 14)
How many sig figs does the following number have?
0.009680
4
Give the SI unit that measures the amount of matter in an object.
kilogram OR gram
What is significant about -273.15 C?
-273.15 C is 0 K and represents "absolute zero" or no heat.
We can relate it to Celsius through the following equation:
K + 273.15 = C
Define "density"
The mass in a certain volume.
Calculate the following, and report answer using correct sig figs:
4.25 x 0.09 = ?
Raw answer: 0.3825
Sig Figs: 0.4
Put the following into expanded notation:
8 x 10^-3
0.008
What are the perks of the SI (or metric) system?
1. Logical (with powers of 10)
2. Widely used in other countries
3. Versatile (prefixes apply to all types of units)
What example of a non sequitur did we talk about in class?
Define "non sequitur"
"does not follow"
A logic error in which a conclusion is not a logical consequence of the evidence it's based on.
Calculate the following, and report answer using correct sig figs:
(5.79 + 4.362) / 2 = ?
Raw answer: 5.076
Sig Figs: 5
Put the following number in scientific notation:
9/10,000
9 x 10^-4
If I measure the desk to be 2.5 ft long, how many kilometers is that?
(Hint: 1.0 inch = 2.54 cm)
0.00076 km