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3 years ago

What is the purpose of the database is

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1 answer:

TiliK225 [7]3 years ago

3 0

Answer:

The major purpose of a database is to provide the information system (in its broadest sense) that utilizes it with the information the system needs according to its own requirements

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Alicaandgeraldolinepeliadreferecrerd

sdas [7]

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3 years ago

the musical note e can be modeled by the function, y = asin(1320πx), where a = 1 and x is the time in seconds. playing note e on

kvasek [131]

Answer:

Miguel Asin y Palacios has written: 'Abenmassarra y su escuela'

Explanation:

3 0

3 years ago

A bat emits a sound at a frequency of 3. 00 × 104 hz as it approaches a wall. The bat detects beats such that the frequency of t

OLga [1]

Taking into account the Doppler efect, the speed of the bat is closest to 5.02 $\frac{m}{s}$ .

The Doppler effect is defined as the apparent frequency change of a wave produced by the relative movement of the source with respect to its observer. In other words, this effect is the change in the perceived frequency of any wave motion when the sender and receiver, or observer, move relative to each other.

The following expression is considered the general case of the Doppler effect:

$f1=f\frac{v+-vR}{v+-vE}$

Where:

f1, f: Frequency perceived by the receiver and frequency emitted by the issuer respectively. Its unit of measurement in the International System (S.I.) is the hertz (Hz), which is the inverse unit of the second (1 Hz = 1 s⁻¹)
v: Velocity of propagation of the wave in the medium. It is constant and depends on the characteristics of the medium. In this case, the speed of sound in air is considered to be 340 m/s
vR, vE: Speed of the receiver and the sender respectively. Its unit of measure in the S.I. is the m/s
±, ∓:

We will use the + sign:

In the numerator if the receiver approaches the sender

In the denominator if the sender moves away from the receiver

We will use the sign -:

In the numerator if the receiver moves away from the emitter

In the denominator if the sender approaches the receiver

In this case, a bat emits a sound at a frequency of 3.00×10⁴ Hz= 30,000 Hz as it approaches a wall.

The bat detects beats such that the frequency of the echo is 900 hz higher than the frequency the bat is emitting.

So, you know:

f1= 30,000 Hz + 900 Hz= 30,900 Hz
f= 30,000 Hz
v= 340 m/s
vE=vR= vbat
Receiver approaches the sender

Replacing in the expression is considered the general case of the Doppler effect:

$30900 Hz=30000 Hz\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}$

Solving:

$\frac{30900 Hz}{30000 Hz} =\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}$

$1.03=\frac{340 \frac{m}{s} +vbat}{340\frac{m}{s} -vbat}$

1.03×( 340 $\frac{m}{s}$ -vbat)= 340 $\frac{m}{s}$ + vbat

1.03×340 $\frac{m}{s}$ - 1.03×vbat= 340 $\frac{m}{s}$ + vbat

350.2 $\frac{m}{s}$ - 1.03×vbat= 340 $\frac{m}{s}$ + vbat

350.2 $\frac{m}{s}$ - 340 $\frac{m}{s}$ = vbat + 1.03×vbat

10.2 $\frac{m}{s}$ = 2.03×vbat

10.2 $\frac{m}{s}$ ÷ 2.03 = vbat

In summary, the speed of the bat is closest to 5.02 $\frac{m}{s}$ .

Learn more about the Doppler effect:

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2 years ago

Which of the following is a common trait in a four-year college?

GrogVix [38]

C. - A dynamic campus life
Hope I helped

7 0

3 years ago

Read 2 more answers

The following excerpt is from "the lamp of psyche" by edith wharton (published in 1895). In this passage, a newly remarried deli

vivado [14]

This is the description about Delia's character in the story by Edith Wharton:

Although I was no able to find the passage, there are some characteristics about Delia Benson Corbett that can be useful to analyze her choices and actions.

Delia was challenged mentally and emotionally by her first husband. However, she was able to leave her past behind. She uses her irony to deal with her past suffering and she also grew strength by focusing on her own and her job, as well as her belief in religion.

<h3>What is an essay?</h3>

In this exercise, you have to write the description about the passage using an essay structure.

An essay is a written text that can express an opinion about something. You need to do a research before writing an essay so you can get all the information to justify your opinions. In this case, you have to analyze the passage given.

This is an essay structure:

introduction: you could present the story and explain that there are choices and actions from Delia that can explain how is she a complex character.

body: here you have to analyze Delia's choices and actions and prove what you presented in the introduction.

conclusion: you can give a summary about the main idea of the essay.

Check more information on writing essays brainly.com/question/11473248

5 0

2 years ago

What is the purpose of the database is​

What is the purpose of the database is