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Nadya [2.5K]
3 years ago
10

A truck is traveling 70.0 kph away from you. The driver is blowing the horn, which has a frequency of 400 Hz. The air temperatur

e is 25°C. What is the observed frequency of the horn?
Physics
1 answer:
Helga [31]3 years ago
4 0
Use this site is better https://www.cymath.com/
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A wave is travelling at 3000 m/s has a wavelength of 1 m.
Levart [38]

Answer:

a] 3000hz

b]3.33 × 10⁻⁴

ci]300

ii] 3000

iii]60,000

Explanation:

3 0
3 years ago
Giving quadrilateral a(2,-1 ) b ( 1,3) c(6,5) d(7,1) you want to prove that it is a parallelogram by showing opposite sides are
solong [7]

Answer:

Opposite sides are congruent (AB = DC).

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Consecutive angles are supplementary (A + D = 180°).

If one angle is right, then all angles are right.

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Each diagonal of a parallelogram separates it into two congruent triangles.

Explanation: #if you need any queshtions answered within secs/mins hit me up and I gotchu.

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2 years ago
Density is a measure of an object's _____ per unit _____.
ladessa [460]
<span>Density is a measure of an object's </span>mass per unit of volume

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7 0
3 years ago
Martin has severe myopia, with a far point on only 17 cm. He wants to get glasses that he'll wear while using his computer whose
marusya05 [52]

Answer:

Explanation:

Far point = 17 cm . That means he can not see beyond this distance .

He wants to see at an object at 65 cm away . That means object placed at 65 has image at 17 cm by concave lens . Using lens formula

1 / v - 1 / u = 1 / f

1 / - 17 - 1 / - 65 = 1 / f

= 1 / 65 - 1 / 17

= -  .0434 = 1 / f

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= - 100 x .0434

= - 4.34 D .

6 0
3 years ago
Which of the following best defines insulator?
Leya [2.2K]

Answer:a substance with low ability or no ability to conduct energy

Explanation:

6 0
3 years ago
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