2 years ago

Select the correct answer.

Physics

1 answer:

Otrada [13]2 years ago

7 0

Answer:

Explanation:

this is because the car is only moving in the horizontal line ..it is moving with constant velocity ..

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The generator at a power plant produces AC at 20,000 V. A transformer steps this up to 355,000 V for transmission over power lin

Masja [62]

Answer:

Number of coil in the output is 39938

Explanation:

We have given a step up transformer

Input voltage of transformer, that is primary voltage $v_p=20000volt$

Output voltage, that is secondary voltage $v_s=355000volt$

Number of turns in primary $N_p=2250$

For transformer we know that $\frac{V_p}{V_s}=\frac{N_p}{N_s}$

$\frac{20000}{355000}=\frac{2250}{N_s}$

$N_s=39937.5$

As the number of turns can not be in fraction so number of turns in the output coil is 39938

7 0

2 years ago

If you were to divide the presentday universe into cubes whose sides are 10 million lightyears long, each cube would contain, on

vovikov84 [41]

Answer:

Explanation:

density of galaxies would be $\frac{1}{0.27^3}$ times higher which is equal to 50.81.

It means in a cube that today contains one galaxy the size of the Milky Way, we would instead find 50.81 galaxies this size.

You can round this off to 52

8 0

3 years ago

AYE I NEED HELP!<br> Which two things balance and keep a main sequence star in equilibrium?

gladu [14]

Answer:

While self-gravity pulls the star inward and tries to make it collapse, thermal pressure (heat created by fusion) pushes outward. These two forces cancel each other out in a main sequence star, thus making it stable.

Explanation:

7 0

2 years ago

7. Answer each of the following questions if the student applied a 550N force to a 100kg box on the same surface. What would be

blagie [28]

F=ma
550=100a
a=550/100
a=5.5 m/s²

5 0

2 years ago

Resistivity of metallic wire

bixtya [17]

Answer:

nature of material

hope this help you

6 0

2 years ago