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Mars2501 [29]
3 years ago
8

A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how

many turns are in the secondary?
Physics
1 answer:
Eduardwww [97]3 years ago
6 0
Here's a fun and useful factoid:

               The ratio of the voltages on a transformer is the same
               as the ratio of the number of turns in each winding.

So the ratio of  (345 to the secondary turns)  is  (115V to 24V).

That's a proportion.

                 (115/24)  =  (345/x)

I'll bet you can take it and solve it from here.
Just cross-multiply in the proportion and etc. etc.
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Which season is signaled by average lower temperature and indirect, angled sunlight?
anygoal [31]

When the earth in its translation movement has the earth's axis is further from the sun and the energy per unit area is minimal, we have the winter season

 

The translation is the movement of the earth around the Sun, this movement establishes the duration of the year, also the earth's axis is inclined about 23.5º in relation to the orbit.

A consequence of this inclination of the Earth's axis is that the solar rays reach the surface of the planet with different inclinations, when they arrive more perpendicularly the energy deposited by the surface unit is greater and therefore the temperature increases, this period is called Summer.

When the rays arrive with the greater inclination, the energy deposited per unit area is minimal, which is why the temperature decreases, this period is called Winter.

In the periods when the axis is almost vertical we have an average absorption of energy, these two periods are called Spring and Autumn.

In conclusion, the winter season occurs when the terrestrial axis is furthest from the sun and the energy per unit of area is minimal.

Learn more about the seasons here:

brainly.com/question/20435793

4 0
3 years ago
A 2.00 kg object is attached to a spring and placed on frictionless, horizontal surface. Ahorizontal force of 18.0 N is required
velikii [3]

Answer:

6 rad/s

Explanation:

In a spring the angular frequency is calculated as follows:

\omega=\sqrt{\frac{k}{m} }

where \omega is the angular frequency, m is the mass of the object in this case m=2kg, and k is the constant of the spring.

To calculate the angular frequency, first we need to find the constant k which is calculated as follows:

k=\frac{F}{x}

Where F is the force: F=18N, and x is the distance from the equilibrium position: x=0.25m.

Thus the spring constant:

k=\frac{18N}{0.25m}

k=72N/m

And now we do have everything necessary to calculate the angular frequency:

\omega=\sqrt{\frac{k}{m} }=\sqrt{\frac{72N/m}{2kg} }=\sqrt{36}

\omega=6rad/s

the angular frequency of the oscillation is 6 rad/s

7 0
4 years ago
A box (250 kg) sits inside the trailer of a semitruck traveling at a speed of 25 m/s (~ 55 mph). Suddenly, a car in front of the
shtirl [24]

Answer:

RIGHT

Explanation:

given,

mass of box = 250 kg  

speed of the truck = 25 m/s

static friction  µs = 0.7      

g = 10 m/s²                

to find direction of friction on the box    

truck is moving in left direction and suddenly in front of truck a car stops then the driver hit the brake hard so at that moment the box on the trailer will have the tendency to move left so to oppose its movement friction force will be on RIGHT

3 0
3 years ago
In reading the instruction manual that came with your garagedoor opener, you see that the transmitter unit in your car produces
iVinArrow [24]

Answer:

0.09221 V/m

Explanation:

\mu_0 = Vacuum permeability = 4\pi \times 10^{-7}\ H/m

P = Power of transmitter = 250 mW

r = Distance to source = 42 m

c = Speed of light = 3\times 10^8\ m/s

E_0 = Electric field amplitude

Intensity of a wave is given by

I=\frac{P}{4\pi r^2}\\\Rightarrow I=\frac{250\times 10^{-3}}{4\pi \times 42^2}\\\Rightarrow I=1.12779\times 10^{-5}\ W/m^2

Intensity is also given by

I=\frac{E_0^2}{2\mu_0 c}\\\Rightarrow E_0=\sqrt{I2\mu_0 c}\\\Rightarrow E_0=\sqrt{1.12779\times 10^{-5}\times 2\times 4\pi \times 10^{-7}\times 3\times 10^8}\\\Rightarrow E_0=0.09221\ V/m

The electric field amplitude at the receiver when it first fails is 0.09221 V/m

3 0
4 years ago
A man is dragging a
valentinak56 [21]
It's too much I don't understand.sorry
8 0
3 years ago
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