Physics 101

Homework #1

1)         Express the following numbers in scientific notation:
           
            a)  .00059        =5.9x10^-4

            b)  891000       =8.91x10^5

            c)  1,650,000   =1.65x10^6
           
            d)  .0000798    =7.98x10^-5


  2)       Galileo'sobservations of Jupiter using the telescope supported the

                _______view of the universe.  a)Geocentric  b)Ethnocentric  c)  Heliocentric  d)Anthropocentric. 

 3)        Using dimensional analysis, convert the following:
           
            a)  379 m into feet                  1243 ft



 
            b)  3x108 m/s into mi/hr         6.71x10^8 mi/hr




            c)  19 years into seconds        5.99x10^8 s




 4)        Driving to USI, your car travels at a constant velocity of 22 m/s for a 30second period.During this time your car's

             acceleration was ________

a)  17 m/s2       b)  1.7 m/s2      c)  .17 m/s2      d)  0 m/s2


5)         Around 200 AD, Ptolemy explained the retrograde motion of Mars across the sky by proposing his_______

model of the universe.

            a) Heliocentric   b)Ethnocentric    c)  Geocentric    d)Anthropocentric.