Answer:
2 seconds
Explanation:
The frequency of a wave is related to its wavelength and speed by the equation
where
f is the frequency
v is the speed of the wave
is the wavelength
For the wave in this problem,
v = 2 m/s
So the frequency is
The period of a wave is equal to the reciprocal of the frequency, so for this wave:
This means that the wave takes 4 seconds to complete one full cycle.
Therefore, the time taken for the wave to go from a point with displacement +A to a point with displacement -A is half the period, therefore for this wave:
Answer:
0.000439077936334 m
Explanation:
q = Charge of electron =
E = Electric field =
= Permittivity of free space =
d = Distance between plates = 2 cm (assumed)
m = Mass of electron =
The beam consists of electrons which means it has negative charge this means the upper plates will be positive and the lower plate will be negative.
The direction is upper to lower lower plate.
= Permittivity of free space =
Electric flux is given by
The charge per unit area on the plates is
Deflection is given by
The deflection is 0.000439077936334 m
Protons and neutrons make up the nucleus of an atom