Models and Metric
What role does the comma play in writing numbers in Spansih? In English?
In Spanish the comma separates whole numbers and fractions, whereas in English the comma denotes place values in numbers larger than 999 at every three decimal places.
What is the average density of water?
~ 1 g/mL
What differentiates a scalar from a vector?
A scalar has only magnitude. A vector has magnitude and direction.
All waves are caused by some type of what?
vibration
Name the place values for 4321 in the number 4.321
ones, tenths, hundredths, thousandsth
What is the equation for density?
density = mass / volume
Which is typically greater: distance or displacement?
distance
As wavelength gets bigger, frequency gets...
smaller
Which of these is not a common type of model?
Conceptual
Visual
Mathematical
Preporatorial
Preporatorial
For something to float, the buoyant force must be _______ then gravitational force.
greater than
What is the difference between the units for speed and the units for acceleration?
speed is m/s and acceleration is m/s/s or m/s^2
scientific notation
Leading zeros
Sandwiches zeros
Trailing zeros in a whole number
Trailing zeros in a decimal number
Which of these are significant?
Only sandwiched zeros and trailing zeros in a decimal number are ever significant
What common laboratory instrument does one typically use to find the volume of irregular solid objects?
graduated cylinder
What four forces act on an aircraft in flight?
lift, drag, gravity, thrust
What is the greek letter used to represent wavelength?
lambda (λ)
Should you round before or after doing arithmetic?
After. Rounding before can drastically change your final value.
When an object is submerged in water, the volume of the water displaced is equal to what?
The volume of the object
When graphing motion, time is almost always on what axis?
The x-axis.
An ambulance siren sounding higher when moving towards you and lower when moving away is caused by the...
Doppler Effect