When you drop a penny off the roof of a building, it takes 5 seconds to reach the ground. How high is the roof?

their crystal patterns have been disrupted by stress

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles