Ask question

Ask question

All categories

alexandr1967 [171]

3 years ago

15

Why is polaris used as a celestial reference point?

1 answer:

ser-zykov [4K]3 years ago

8 0

At the equator, the North Celestial and South Celestial Poles would lie on the horizon where the meridian intersects the horizon. Polaris is called the "North Star." ... Polaris is special because the Earth's North Pole points almost exactly towards it.

You might be interested in

How does the law of conservation of energy apply to machinesBased on the law of conservation of energy, how can we reasonably im

SIZIF [17.4K]

Answer:

According,to the law of conservation of energy,the amount of energy in a closed system always stay constant. ... So,the amount of work output and other transformed energy is equal to the amount of energy inputs. • In this way,the conservation of energy is fulfilled by the machines.

8 0

3 years ago

Care este densitatea materialului din care se confectioneaza un cub de 5cm daca masa lui este de 0,975kg/m3?

ValentinkaMS [17]

Answer:

i speak english not spanigh sorry :(

Explanation:

5 0

3 years ago

Read 2 more answers

What is the definition of erosion

babunello [35]

Answer:

Erosion is the process of eroding or being eroded by wind, water, or other natural agents.

Explanation:

"the problem of soil erosion"

the gradual destruction or diminution of something.

"the erosion of support for the party"

are examples of how it could be used.

5 0

3 years ago

Read 2 more answers

Critics of the electoral college argue that the system can result in the selection of —

Romashka [77]

Answer:

President who did not win the popular vote

Explanation:

Critics of the Electoral college argue that the system can result in a selection of what?

6 0

3 years ago

An organ pipe open at both ends has two successive harmonics with frequencies of 220 Hz and 240 Hz. What is the length of the pi

Harman [31]

Answer:

The length is $l = 8.6 \ m$

Explanation:

From the question we are told that

The frequencies of the two successive harmonics are $f_1 = 220 \ Hz$ , $f_2 = 240 \ Hz$

The speed of sound in the air is $v_s = 343 \ m/s$

Generally the frequency of a given harmonic is mathematically represented as

$f_n = \frac{n v }{2l}$

Here n defines the position of the harmonics

Now since the position of both harmonic is not know but we know that they successive then we can represented them mathematically as

$220 = \frac{n v}{2l}$

and

$240 = \frac{(n+1) v}{2l}$

So

$\frac{(n + 1 ) v}{2l} - \frac{n v}{2l} = 240-220$

=> $\frac{v}{2l} = 20$

=> $l = 8.6 \ m$

7 0

3 years ago