Final Velocity (VF) - Initial Velocity (VI) Time (t)
A cheetah starts at rest (0 m/s) and begins to run after an antelope. He runs for 180 seconds getting up to a velocity of 28 m/s. What is
the cheetah's acceleration?
Final Velocity (VF) =
m/s
Inital Velocity (Vi) =
m/s
Time =
seconds
What is the cheetah's acceleration?=
m/s2
Do not forget to round to one decimal place!

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)