To solve this problem we will apply the concepts related to the electric field, linear charge density and electrostatic force.
The electric field is
Here,
= Linear charge density
= Permittivity of free space
r = Distance
The linear charge density can be written as,
Linear charge density is given as
Replacing,
The initial and final electric Force can be written as function of the charge and the electric field as
If we replace the value for the electric field we have,
Length is one third at the end, then
The ratio of the force is
Therefore the required ratio is 3
Answer:
290
Explanation:
Average acceleration is the change in velocity over change in time.
First, find the velocity by taking the derivative of position.
v(t) = dx/dt
v(t) = 38t + 21t²
At t = 3 and t = 9:
v(3) = 303
v(9) = 2043
So the average acceleration is:
a = Δv / Δt
a = (2043 − 303) / (9 − 3)
a = 290
Use appropriate units.
Democritus theorized that atoms were specific to the material which they composed
Answer:
the distance of the top of the window below the windowsill from which the flowerpot fell is 0.31 m
Explanation:
given information:
time, t = 0.420 s
height, h = 1.9 m
the the vertical motion equation:
h = 
t + 
where
h = height (m)
= initial velocity (m/s)
t = time (s)
g = gravitational force (9.8 
)
first we calculate the velocity of the flowers pot when it reaches top window
h = t +
1.9 = (0.42) + (
)
= (1.9 - ())/0.42
= 2.47 m/s
now we can find the distance of the windowsil
+ 2gh
v = 0, thus
2gh = - 
h = -/2g
= 
/ (2 x 9.8)
= 0.31 m
