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Mashutka [201]
2 years ago
13

PLEASE HELP NO LINKS NEED HELP FAST

Physics
1 answer:
MrRa [10]2 years ago
7 0

Answer:

The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest. This means that no matter what galaxy you happen to be in, all the other galaxies are moving away from you

Explanation:

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A pilot in an airplane flying at 25,000 ft sees two towns directly ahead of her in a straight line. The angles of the depression
insens350 [35]

Answer:

The towns are 32,635 ft apart.

Explanation:

From the image drawn below:

AB = x ft

BC = a ft

AC = (x + a) ft

Considering triangle PCB,

tan 50° = 25000 / a

Or,

a = 25000 / tan 50°

Since tan x = 1/ cot x

a = 25000×cot 50°------------------------------------1

Considering triangle PCA,

tan 25° = 25000 / (a + x)

Or,

a + x = 25000 / tan 25°

Since tan x = 1/ cot x

a + x = 25000×cot 25° -------------------------------2

Thus, finding x from equation 1 and 2, we get:

x = 25000 (cot 25° - cot 50°)

Using cot 25° = 2.1445 and cot 50° = 0.8394, we get:

<u>x ≈ 32,635 ft</u>

<u>Thus, the distance between two towns is 32,635 ft.</u>

5 0
3 years ago
Read 2 more answers
A disk drive plugged into a 120V outlet operates on a voltage of 12V . The transformer that powers the disk drive has 125 turns
Serga [27]

Answer:

(A-) Number of turns in secondary coil will be<u> less than 125.</u>

(B-) EXPLAIN- The voltage is to be lowered.<u> The voltage will be reduced from 120 to 9 volts.</u> As a result, a<u> step down transformer </u>will be used, indicating that the secondary coil's number of turns would be less than 125.

(C-)<u> The number of turns on the secondary coil is 12.5</u>

<u></u>

Explanation:

  • STEP DOWN TRANSFORMER - A step-down transformer transforms high voltage (HV) and low current from the transformer's primary side to low voltage (LV) and high current on the secondary side. A phase down transformer is the opposite of this.

In electrical networks and transmission lines, a step-down transformer can be used in a number of ways.

<u>Step down transformer formula-</u>

                  V_s=\frac{N_s\times V_p}{N_p}

We are given with the -

Primary voltage V_p = 120V

Secondary voltage Vs=12V

Number of primary turns N_p=125

  • <u>To calculate the number of turns on the secondary coil -</u>

       Since , the transformer ratio is given as -

                   \frac{N_s}{N_p} =\frac{V_s}{V_p}

So, the number of turns on the secondary coil is - N_s=N_p\times\frac{V_p}{V_s}

            Putting , the given values -:

                125\times\frac{12}{120}

         =   12.5

<u>Therefore , the number of turns on secondary coil is 12.5 .</u>

6 0
3 years ago
565900 seconds into day
olasank [31]
The answer is 6 and a half days
3 0
3 years ago
To what is amplitude related? (1 pointthe amount of energy carried by the wave the maximum displacement from the rest position n
Tamiku [17]
Both the first and the second choices above 
4 0
3 years ago
Which of the following have derived units?<br> A. 56 kg<br> B. 2.5 m<br> C. 87 m/s²<br> D. 60 N
photoshop1234 [79]

Answer:

The answer is C!!!!!!!

Becuz meters and seconds are derived into m/s²

Explanation:

Plss follow me and Mark as brainlest

Thanks :-)

6 0
3 years ago
Read 2 more answers
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