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Gala2k [10]
3 years ago
14

Question for the day!

Physics
2 answers:
AveGali [126]3 years ago
6 0
Answer:
1-a
2-c
3-d
4-b

Explanation:
Alex17521 [72]3 years ago
3 0

Answer:

1. <--> A.

2. <--> C.

3. <--> D

4. <--> B.

explanation: i know my science!

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There is evidence that elephants communicate via infrasound, generating rumbling vocalizations as low as 14 Hz that can travel u
amid [387]

Answer:

L = 96.2 dB

Explanation:

As we know that the level of intensity is given as

\beta = 10Log(\frac{I}{I_o})

here we know

\beta = 104 dB

104 = 10Log(\frac{I}{10^{-12}})

I = 0.025 W/m^2

now the sound is travelling in all possible directions so we have

\frac{I_1}{I_2} = \frac{r_2^2}{r_1^2}

\frac{0.025}{I_2} = \frac{10^2}{4.1^2}

I_2 = 4.2 \times 10^{-3} W/m^2

now for level of sound we have

L = 10Log(\frac{4.2 \times 10^{-3}}{10^{-12}})

L = 96.2 dB

5 0
3 years ago
While 75-kg Anthony roller skates at 3 m/s, 60-kg Sue jumps into his arms with a velocity of 5 m/s. How fast does the pair go to
anzhelika [568]

Apply conservation of linear momentum

\\ \rm\Rrightarrow m1v1+m2v2=(m1+m2)V3

\\ \rm\Rrightarrow 75(3)+60(5)=(75+60)V3

\\ \rm\Rrightarrow 225+300=135v3

\\ \rm\Rrightarrow 525=135v3

\\ \rm\Rrightarrow V3=3.89m/s

7 0
2 years ago
Good night all of you​
Helen [10]

Answer: Good night

Explanation:

3 0
3 years ago
Read 2 more answers
When a star is in the main-sequence stage of its life, it is fusing __________ into ________
gizmo_the_mogwai [7]
Hydrogen into helium
7 0
3 years ago
A harmonic wave is traveling along a rope. the oscillator that generates the wave completes 46.0 vibrations in 26.0 s. a given c
Rudik [331]
The crest of the wave has traveled 415 cm in 11.7s. then the crest should have travelled 415/11.7 cm in one second i.e. 35.47cm. Then the crest should have travelled 26*35.47 cm in 26 seconds i.e. 922.2cm which has 46 vibrations in it.
so for length of each vibration (Wavelength) is 20 cm
6 0
3 years ago
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