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Dimensions of displacement, velocity, & acceleration 
displacement=[L] velocity= [L]/[T] acceleration= [L]/[T^2]
Distance (x) 
total length of travel **SI unit= meter (m)
Displacement (delta x)
-change in position delta x= x final-x initial **SI unit= meter (m)
Average speed
avg. Speed=distance/elapsed time **SI unit= m/s
Average velocity 
avg. V= displacement (Xf-Xi)/elapsed time (Tf-Ti) SI unit= m/s
Common Prefixes (above zero) 
peta: 10^15 tera: 10^12 giga: 10^9 mega: 10^6 kilo: 10^3 hecto: 10^2 deka: 10^1
Common prefixes (below zero) 
deci: 10^-1 centi: 10^-2 milli: 10^-3 micro: 10^-6 nano: 10^-9 pico: 10^-12 femto: 10^-15
Sig. figs for multiplication/division 
least number of sig figs of numbers being multiplied/divided 
Sig figs for addition/subtraction 
least number of decimal places 
Suppose 1.0 cubic meter of oil is spilled into the ocean. Find the area of the resulting slick, assuming that it is one molecule thick and that each molecule occupies 0.50 micrometers on a side 
volume=area x thickness 3m^3=a x .5e^-6 a=??
New York is roughly 3000 miles from Seattle. When it is 10 am in Seattle, it is 1 pm in NY. Using this information, estimate a) the rotational speed of the surface of the earth b) the circumference of the earth and c) the radius of the earth
a) 3000miles/3 hrs= 1000mph b) 3hr/24 hrs across globe= 1/8--> 8*3000miles= 2400=circumference c) C=2(Pi)r
You jog at 9.5 km/h for 8.0km, then you jump in a car and drive an additional 16km. With what average speed must you drive your car if your average speed for the entire 24 km is to be 22 km/hr?
8 km traveled in= .842 hrs 16 km traveled in ? hours 24 km traveled in= 1.091 hrs 1.091=.842+? ?=.249 hours 16km/.249 hours=64.25 km/hr
Acceleration 
a=v/t
Cos
adjacent/ hypotenuse 
Sin
opposite/hypotenuse 
tan 
opposite/adjacent 
Scalar vs. Vector 
scalar-number with units vectors-quantity with magnitude and direction
T/F: when traveling at a 45 degree angle you are moving the same distance in the X and Y directions 
True 
Time it takes to reach the peak of something starting and ending on same elevation 
t=Vosin(theta)/g
Range of something starting and ending on same elevation 
R=(Vo^2/g)sin2(theta)
equation for average velocity 
avgV=(d1+d2)/(t1+t2)
Circumference of a circle 
C=2PiR

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