Answer:
Explanation:
k = Coulomb constant =
r = Distance between charges = 2 cm
The electric force is given by
Also
The sum of the force is given by
Thus .
The negative sign is because the force points downward which is taken as negative
Answer:
physical
Explanation:
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Answer:
f = 214.4 Hz
Explanation:
It is a process of standing waves two waves one that travels to the right and another to the left are added, it is assumed that the frequency of the wave does not change, the result is a stable wave.
In the process of reflection of the wave there are two possibilities if the end is closed a node is formed and if it is open a belly is formed (antinode or maximum)
Let's apply these reasoning to our problem. We assume that the wave initially travels to the right, as it enters through an open end at that point it has a belly. When it reaches the other end that is open we also have a belly. As we see we have bellies at the ends, for there to be a wave inside the tube there must be a node, for the lowest resonance there is only one node, which must be in the center of the tube.
The distance from a node to a maximum (belly) corresponds to ¼ wavelength, so in this case we have within ½ tube wavelength
L = ½ λ
λ = 2L
λ = 2 0.80
λ = 1.60 m
Having the wavelength and the speed of sound let's use
v = λ f
f = v / λ
f = 343 / 1.60
f = 214.4 Hz
Answer:
180 turns
Explanation:
Transformer: A transformer is an electrical device that operates based on the principle of electromagnetic induction.
Using
Ns/Np = Vs/Vp.............................. Equation 1
Where Ns = Number of turns in the secondary coil, Np = Number of turns in the primary coil, Vs = Voltage in the secondary coil, Vp = Voltage in the primary coil
Make Np the subject of the equation
Np = Ns(Vp/Vs)................... Equation 2
Given: Ns = 45 turns, Vp = 120 V, Vs = 30 V
Substitute into equation 2
Np = 45(120/30)
Np = 180 turns.
I think it’s ( Only the arm length should be changed. The mass should remain the same )