To solve this problem, it is necessary to apply the concepts related to the electric field according to the intensity of the wave, the permittivity constant in free space and the speed of light.
As well as the expression of the rms of the magnetic field as a function of the electric field and the speed of light.
PART A) The expression for the rms of electric field is
Where,
S= Intensity of the wave
= Permitivitty at free space
c = Light speed
Replacing we have that,
The RMS value of electric field is
PART B) The expression for the RMS of magnetic field is,
The RMS of the magnetic field is
B.
An interjection, most likely along the lines of "Ow" or "Ouch", would follow after stubbing one's toe.
Also, this seems to be an English question as opposed to a physics one; just noting.
Answer:
Explanation:
The Law of Conservation of Mass states that mass cannot be created or destroyed.
So, in a chemical reaction, the mass before a reaction and after cannot be different. In other words, the mass of the products must be equal to the product of the reactants.
So, this is a <u>true statement.</u>
Answer:
Explanation:
Boy information
Mass = 50kg
Velocity = 5m/s
Trolley information
Mass = 20 kg
Velocity = 1.5 m/s
so using conservation law of momentum
MV + mv = ( M + m ) v'
50*5 + 20*1.5 = ( 50 + 20 ) v'
250 + 30 = 70 v'
280 = 70 v'
so v' = 4m/s which is their common velocity.