Answer:
A vector is any quantity with both magnitude and direction. Other examples of vectors include a velocity of 90 km/h east and a force of 500 newtons straight down.
Explanation:
A)
The magnitude of the capacitive reactance is given by
where
is the angular frequency
C is the capacitance
While the magnitude of the inductive capacitance is given by
where L is the inductance.
Since we want the two reactances to be equal, we have
So we find
B) 7449 rad/s
In this case, we have
is the inductance
is the capacitance
Therefore, substituting in the formula for the angular frequency, we find
C)
Now we can us the formulas of the reactances written in part A). We have:
- Capacitive reactance:
- Inductive reactance:
Answer:
2.5 m/s
Explanation:
Mechanical energy is the sum of the potential and kinetic energy.
E = PE + KE
E = mgh + ½mv²
172.1 J = (7.26 kg) (9.8 m/s²) (2.1 m) + ½ (7.26 kg) v²
v = 2.5 m/s
Operation of a motor:
A motor takes electrical energy as input which energizes the windings of the motor and a changing magnetic field is generated which in turn generates force in the form of torque.
Let us have a look at the given options:
Option 1:
A motor works by changing the magnetic flux to change the voltage of a circuit.
This is incorrect.
Option 2:
A motor works by electrical energy moving a charge through a loop in a magnetic field, causing the loop to rotate.
This is the correct statement, this is how a motor operates.
Option 3:
A motor works by rotating a magnet in order to generate electricity.
This is incorrect since a motor consumes electricity (it does not generate electricity)
Option 4:
A motor works by using physical work to push a charge through a loop, generating a uniform magnetic field.
This is incorrect since a motor does not physical work to operate.
Therefore, the only correct statement is option 2
Answer: <em>Hi bro!</em>
<u><em>Have a good day!</em></u>