no, work is = force * distance or displacement
Answer:
D. the rate at which work is accomplished
Explanation:
Answer:
(A). The flux is 0.336 N.m²/C
(B). The flux is zero.
Explanation:
Given that,
Length = 4.2 cm
Width = 4.0 cm
Electric field 
Area vector is perpendicular to xy plane
(A). We need to calculate the flux
Using formula of flux

Where, E = electric field
A = area
Put the value into the formula



(B). Given electric field

We need to calculate the flux
Using formula of flux

Put the value into the formula

Here, The component of k is not given
So, the flux is

Hence, (A). The flux is -0.336 N.m²/C
(B). The flux is zero.
Base in your questions that ask what cause the bright lines seen in the emission spectrum and i think the best answer to that is the H2 gas is used when protons was heated so the electron absorb all the photons and get exited and resulted by given of a light.
To solve this problem it is necessary to take into account the concepts of Intensity as a function of Power and the definition of magnetic field.
The intensity depending on the power is defined as

Where
P = Power
r = Radius
Replacing the values that we have,


The definition of intensity tells us that,

Where,
Magnetic field
Permeability constant
c = Speed velocity
Then replacing with our values we have,

Re-arrange to find the magnetic Field B_0

Therefore the amplitude of the magnetic field of this light is