CFI Physics Exam #1


A physicist records the length of apendulum as 152.4cm +/- 0.1 cm. The designation of +/- is most properly called that _________.


Margin of error


Waht is the fundamental SI until of mass?


Kilogram


How would you write 39,000,000 in scientfic notation?


9.3 x 107


True/False: 5 Liters - 2 square inches is a possible process.
True False


False: They are different dimensions


Which is a derived unit:
m, s, m/s, or K


m/s (meters per second)


What does the prefix nano- mean?


10-9


How many signifigant digits are in the number 6.02200?


6


Two quantities cannont be compared, added, or subtracted unless they have teh same ___________.


Dimensionality


All objects in __________ have the same accelration.


free fall


Which of the following is a vector quanity:
Velocity, Mass, Time, or Speed


Velocity


What equation is used to calculate centripetal acceleration?


ac=v2/r


What will happen if arrow A is shot horizontally at the exact moment that an identical arrow B is dropped from the same height?


Arrows A and B will hit the ground at the same time


If you are driving a car at a constant speed around a circular track, are you accelerating?


Yes, because my direction is continually changing