Answer:
a 
b 
c 
Explanation:
From the question we are told that
The magnitude of electric dipole moment is 
The electric field is 
The distance between the positive and negative charge center is mathematically evaluated as
Where e is the charge on one electron which has a constant value of 
Substituting values
The maximum torque is mathematically represented as
Here 
This because at maximum the molecule is perpendicular to the field
substituting values
The workdone is mathematically represented as
where 
is the potential energy at 180° which is mathematically evaluated as
Where the negative signifies that it is acting against the field
substituting values
and
is the potential energy at 0° which is mathematically evaluated as
substituting values
So ![W = 1.24 *10^{-25} - [-1.24 *10^{-25}]](https://tex.z-dn.net/?f=W%20%3D%20%201.24%20%2A10%5E%7B-25%7D%20-%20%5B-1.24%20%2A10%5E%7B-25%7D%5D)
Answer:
Sample Response: The LED lightbulb is the most energy efficient because it loses the least amount of energy as heat.
Answer:
y = 12.82 m
Explanation:
We can solve this exercise using the energy work theorem
W = ΔEm
friction force work is
W = fr . s = fr s cos θ
the friction force opposes the movement, therefore the angle is 180º
W = - fr s
we write Newton's second law, where we use a reference frame with one axis parallel to the plane and the other perpendicular
N -Wy = 0
N = mg cos θ
the friction force remains
fr = μ N
fr = μ mg cos θ
work gives
W = - μ mg s cos θ
initial energy
Em₀ = ½ m v²
the final energy is zero, because it stops
we substitute
- μ m g s cos θ = 0 - ½ m v²
s = ½ v² / (μ g cos θ)
let's calculate
s = ½ 20² / (0.55 9.8 cos 20)
s = 39.49 m
this is the distance it travels along the plane, to find the vertical distance let's use trigonometry
sin 20 = y / s
y = s sin 20
y = 37.49 sin 20
y = 12.82 m
Answer:
the sun or Me not sure but one of them has to be ...
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.
