Aparachutist’s speed during a free fall reaches 13 miles per hour. what is this speed in feet peer second? at what speed, how many feet will the parachutist fall during 10 seconds of free fall? in your computations, use the fact that 1 mile is equal to 5280 feet. do not round your answer

We make the corresponding unit change.
 We have then:
 V = 13 * (1/3600) * (5280)
 V = 19.06666667 feet / s
 Then, after 10 seconds, we have by definition:
 d = v * t
 Where,
 v: speed
 t: time
 Substituting the values:
 d = (19.06666667) * (10)
 d = 190.6666667 feet
 
 V = 19.06666667 feet / s
 d = 190.6666667 feet

Element 17 is chlorine it is a group 7 element(halogen) and belongs to period 3 of the periodic table