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3 years ago

Mary just received a traffic ticket but decided it is not worth being upset about. Mary just made a__________.

Physics

1 answer:

harkovskaia [24]3 years ago

7 0

Mary just received a traffic ticket but decided it is not worth being upset about. Mary just made a primary appraisal

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elixir [45]

Answer:

Explanation:

The answer is A because proton number is the same as atomic number

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3 years ago

A person's temperature is 40

nekit [7.7K]

It would be: 40 + 272 = 313 K

In short, Your Answer would be Option A

Hope this helps!

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3 years ago

a whistle you use to call your hunting dog has a frequency of 21 khz, but your dog is ignoring it. you suspect the whistle may n

laila [671]

To solve this problem we will apply the concepts related to the Doppler effect. According to this concept, it is understood as the increase or decrease of the frequency of a sound wave when the source that produces it and the person who captures it move away from each other or approach each other. Mathematically this can be described as

$f = f_0 (\frac{v-v_0}{v})$

Here,

$f_0$ = Original frequency

$v_0$ = Velocity of the observer

$v$ = Velocity of the speed

Our values are,

$v = 340m/s \rightarrow \text{Speed of sound}$

$f = 20kHz \rightarrow \text{Apparent frequency}$

$f_0 = 21kHz \rightarrow \text{Original frequency}$

Using the previous equation,

$f = f_0 (\frac{v-v_0}{v})$

Rearrange to find the velocity of the observer

$v_0 =v (1-\frac{f}{f_0})$

Replacing we have that

$v_0= (340m/s)(1-\frac{20kHz}{21kHz})$

$v_0 = 16.19m/s$

Therefore the velocity of the observer is 16.2m/s

4 0

3 years ago

Help me besties ok thx

Pachacha [2.7K]

Answer:

$1 \\ 0.5 \times 500 \times 20 \times 20 \\ \ 2 \\ 0.5 \times 0.6 \times 100 \times 100 \\ 3 \\ 1000 \times 0.5 \times 10 \times 10 \\ 1000 \times 0.5 \times 20 \times 20 \\ 1000 \times 0.5 \times 30 \times 30 \\ 4 \\ 0.5 \times 40000 \times 30 \times 30 \\ 5 \\ \sqrt{ \frac{2}{0.1 \times 0.5} }$

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3 years ago

You observe a very large and very hot star in the constellation orion. on the same night, you observe another star in orion that

Neporo4naja [7]

The bigger one as the luminosity has a direct exponential relationship with R of the star so the star which has more surface area will be more luminous than the smaller one

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3 years ago