Notes:

 

MIT News: MIT to make nearly all course materials available free on the World Wide Web.

http://web.mit.edu/newsoffice/nr/2001/ocw.html

August 11, 2001

 

 

Distance Conversions Km - Mi

                    Km          Miles
                  ======       ========
	             1           0,621	
                    10            6,21
                    20           12,43
                    30           18,64
                    40           24,85
                    50           31,07
                    60           37,28
                    70           43,50
                    80           49,71
                    90           55,92
                   100           62,14
                   500           310,69
                  1000           621,37

Units and Conversion Factors

Length

1 ft = 0.305 m

1 in = 2.54 cm

1 mi = 5280 ft

1 mi = 1.61 km

 

Energy

1 ft-lb = 1.36 J

 

Power

1 ft-lb/s = 1.36 W

1 horsepower (hp) = 550 ft-lb/s

1 hp = 746 W

 

USEFUL PHYSICAL & ASTRONOMICAL DATA

Gravitational constant = 6.67 X 10^-11 N-m^2/kg^2

Speed of light, c = 3.00 X 10^8 m/s

 

ANNUITY FORMULA

A = P / { [ 1 - ( 1 + I /12 ) ^ -N ] / ( I / 12 ) } A=MONTHLY PMT, P=PRINCIPAL, I=ANNUAL INT, N=TERM MONTHS

=Principal/((1-((1+Interest_rate/12)^-Term_months))/(Interest_rate/12))

PRESENT VALUE FORMULA

PV = P / [ (1 + I )^N ] = P * [ (1 + I ) ^-N ]