<em>ω</em> = <em>ω</em>₀ + <em>α t</em>
where
<em>ω</em> = final angular velocity
<em>ω</em>₀ = initial angular velocity = 5 rad/s
<em>α </em>= angular acceleration = 25 rad/s²
<em>t</em> = time = 5.0 s
Solve for <em>ω</em> :
<em>ω</em> = 5 rad/s + (25 rad/s²) (5.0 s) = 130 rad/s
Answer:
Current can be induced in a lot of ways. I'll try and list as much of these methods as I can here.
1. Moving a bar magnet relative to a wire coil
2. Moving a wire coil relative to a magnet.
3. Move a wire coil that has electricity flowing though it relative to a wire coil without electricity flowing through it.
4. Moving a current carrying circuit relative to a non-current carrying circuit
5. Rapidly opening and closing the switch of a current carrying circuit beside a non current carrying circuit.
6. Moving a bar magnet through the middle of a wire coil.
7. Moving a wire coil through a magnet
8. Moving a circuit relative to a magnetic field.
The main idea is to cause a change in the magnetic field, or to change the available area of the wire loop, or to change the angle between the field and the loop.
Waves have the
characteristic that they can of transmit energy. This characteristic depend
only on the medium and its properties. Electro-mechanical waves do not need
medium to transfer its energy, is capable of transmitting it through empty
space (vacuum).
<span>Mechanical
waves require a medium in order to transport their energy. Sound waves are an
example of mechanical way. They can not
travel through vacuum. </span>
Change of energy (normally potential energy via temperature change)
