Answer:
New angular speed changes from 16 rpm to 19.95 rpm
Explanation:
In the given system the angular momentum of the system is conserved
initial angular momentum of the system
When 28 kg child moves to the center the moment of inertia changes thus we have
Equating initial and final angular momentum we get
Any point in the wire has 1.12 x . electrons flow per second.
<h3>What causes a current in a wire?</h3>
- Electric current in a wire, where electrons serve as the charge carriers, is a measurement of the amount of charge that moves through any point of the wire in a given amount of time.
- A free electron is drawn to a proton to become neutral if an electron is added to the wire.
- Lack of electrons can result from pushing electrons out of their orbits.
- Electric current is the name given to the constantly moving electrons in wire.
The current is the quantity of charge Q flowing through a certain point of the wire in a time interval of .
I = .
by using this relationship
I=1.80 A, we can find the charge passing any point in the wire in 1 second:
Electric Charge, Q = 1.80 C.
To find how many electrons corresponds to this charge, we should divide this value by the charge of a single electron
charge of the electron = 1.6 x C.
No. of Electrons = Q/q = = 1.12 x .
To learn more about Electric current refer,
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Answer: 125/24 N
Explanation:
The work can be calculated with W = Fs
Where W = work
F = force
and s = displacement
Let's set up the equation:
500w = F * 96m
= 125/24 or roughly 5.2 N of force
The current in a parallel circuits is not constant throughout the circuit. It varies in each path of a parallel circuit. The components that is place across each other have the same voltage in a parallel circuit. Remember, V=RI.
Answer:
Part a)
Frequency of sound is 130 Hz
Part b)
Wavelength of the sound is 2.65 m
Explanation:
Part a)
Frequency of source of the sound is same as the frequency of the sound
Here we know that motion of hammer is back and fourth with frequency
f = 130 cycles per second
so frequency of sound is same as frequency of hammer motion
so we have
Part b)
As we know that the speed of sound is
v = 345 m/s
We know that the frequency of sound is
f = 130 Hz
now the wavelength is given as