Answer:
27.1m/s
Explanation:
Given parameters:
Height of the building = 30m
Initial velocity = 12m/s
Unknown:
Final velocity = ?
Solution:
We apply one of the kinematics equation to solve this problem:
v² = u² + 2gh
v is the final velocity
u is the initial velocity
g is the acceleration due to gravity
h is the height
v² = 12² + (2 x 9.8 x 30)
v = 27.1m/s
Answer: B: It can be made out of wire
Explanation: i just had this question and put this answer and gotten it right:)
Answer:
A
Explanation:
sound waves hit the canyon walls, then bounce back towards you. That's why you hear an echo
