Nam 2 outstanding persons who are associated with the establishment of this religion group? the rastafarianism

A scientist is studying the average speed and fastest recorded speed of four creatures. His results, in miles per hour, are show

MakcuM [25]

Where are the results?

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:

6 0

2 years ago

__1.It is used to remove citrus peels in thin strips. a.spatula b.zester c.peeler d.grater

dem82 [27]

Answer:

C.

Explanation:

A peeler removes fruit and vegetable skins in small strips.

6 0

3 years ago

Andrea has $500 in the bank that she wants to invest in the stock market. she also wants to add $50 per month into this account

Paha777 [63]

The best way for andrea to build up a diversified portfolio of stocks is; by putting her money into dollar-cost averaging.

<h3>What is dollar-cost averaging?</h3>

Dollar-cost averaging is defined as an investment strategy in whereby the individual periodically purchases target assets or invests in a certain portion of funds in one security.

This therefore tells us that Dollar-cost averaging would reduce the risk tolerance associated with purchasing large stock securities.

Thus, we can recommend dollar cost averaging as the best way for andrea to build up a diversified portfolio of stocks.

Read more about stocks at; brainly.com/question/14360614

5 0

2 years ago

Fill in the boxes in the template to identify the nucleotide sequence, from 3′ to 5′, of the trna anticodon that will recognize

Dvinal [7]

The Filled up boxes that identify the nucleotide sequence is given in the image attached.

<h3>How do you get the tRNA anticodon?</h3>

An anticodon is known to be seen at a given end of a transfer RNA (tRNA) molecule. In protein synthesis, when an amino acid is added to the growing protein, a tRNAis said to be produced as the base pairs along with its complementary sequence that is seen on the mRNA strand.

Conclusively, Note that codon is regarded as the a follow up of three nucleotides on mRNA, that encodes for a particular amino acid at translation.

Learn more about DNA from

brainly.com/question/22614557

8 0

2 years ago