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patriot [66]
3 years ago
10

Why does alternating current change direction 50 to 60 times per second?

Physics
2 answers:
Artist 52 [7]3 years ago
8 0

Answer:

Explanation:

i'm not sure but i think it might be b.

pishuonlain [190]3 years ago
6 0

Answer:

A) because it is produced by a generator that changes current direction as it spins

Explanation:

Alternating current has a frequency of around 60 Hz because it is produced by a generator that changes direction as it spins. Every time the arm passes through the magnetic field in the generator, the current changes direction.

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A rigid, insulated tank that is initially evacuated is connected though a valve to a supply line that carries steam at 1 MPa and
meriva

Answer:

Final Temperature of the steam tank = 456.4°C

Explanation:

Assuming it to be a uniform flow process, kinetic and potential energy to be zero, and work done and heat input to be zero also.  We can conclude that,

Enthalpy of the steam in pipe = Internal Energy of the steam in tank

Using the Property tables and Charts - Steam tables,  

At Pressure= 1 MPa and Temperature= 300°C,

Enthalpy = 3051.2 kJ/kg

At Pressure= 1 MPa and Internal Energy= 3051.2 kJ/kg,

Temperature = 456.4°C.

6 0
3 years ago
Solid volumes can always be determined by the displacement method.<br><br> True<br> False
AveGali [126]
True, because the volume of water displaced by a completely submerged object would be equal to the volume of that object.
4 0
4 years ago
How does an object look when it is viewed through a transparent object?
Vitek1552 [10]

Exactly the same

Explanation:

Objects looks exactly the same when viewed through a transparent object. A transparent body allows light to pass through completely. Therefore, the image formed will completely resemble that of the object to be viewed.

Examples are air, glass, pure water.

A translucent body partially allows light to pass through it. Most times, the image is not clear and it is distorted.

An opaque object will not allow light pass through it. It completely obstructs the ray of path of light. An opaque body will produce an image on the screen.

Learn more:

Refraction brainly.com/question/12370040

#learnwithBrainly

5 0
4 years ago
How does radiation move?
Degger [83]
Radiation can move through empty space . to transfer heat: convection cannot.
8 0
3 years ago
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth's
Alexus [3.1K]

Answer:

50000 μT

Explanation:

From the given information:

the diameter of the loop = 1.0 mm = 0.001 m

no of turns (N) = 200

current (I) = 0.199 A

radius = d/2 = 0.001/2

= 5 × 10⁻⁴ m

Recall that;

the magnetic field at the centre of circular wire is:

= \dfrac{\mu I N}{2R}

= \dfrac{4 \pi \times 10^{-7} \times 200 \times0.199}{2\times 5\times 10^{-4}}

= 0.05 T

= 50000 μT

Since the centre of the earth's magnetic field is given to be equal to the magnetic field produced by the wire, then:

the earth's magnetic field = 50000 μT

5 0
3 years ago
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