Answer:
The question is incomplete. However, I believe, it is asking for the acceleration of the elevator. This is 3.16 m/s².
Explanation:
By Hooke's law, 
F is the force on a spring, k is the spring constant and e is the extension or compression.
From the question,
This is the force on the mass suspended on the spring. Its acceleration, a, is given by
This acceleration is more than the acceleration due to gravity, g = 9.8 m/s². Hence the elevator must be moving up with an acceleration of
12.96 - 9.8 m/s² = 3.16 m/s²
The significant figures also known as the significant digits or precision of a number written in positional notation are digits that carry meaningful contributions to its measurements
The string vibrates the surrounding air, which produces a longitudinal wave.
Brainly if correct? Please and thank you :D
Answer:800N
Explanation:
Force of repulsion = kq1q2/r^2
Q1= 20*10^-6
Q2=100*10^-6
R=150cm=0.15m
K= 9*10^9
F= 2*10^-5*1*10^-4*9*10^9/(0.15)^2
F= 2*1*9*10^-5-4+9/(0.15)^2
F= 18*10^0/(0.15)^2
F=18/0.0225
F=800N
Answer:
Assuming that gravity has not caused the ball to start falling then after 2.5 seconds the ball will be 37.5 meters in the air
Explanation:
The ball travels 15 meters every second so for 2 seconds we would multiply 15*2=30. We have 2.5 seconds so to calculate the time traveled in half a second we would divide 15/2=7.5
Then we add 30+7.5= 37.5 meters
