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Maksim231197 [3]
3 years ago
13

Which one is correct?

Physics
1 answer:
ddd [48]3 years ago
5 0

the first one is correct

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a car travels from station A to B at 30kmph during its return trip A it travels 30 km pH for the first half distance and it 70 k
8_murik_8 [283]

Explanation:

If you cannot visualize it, just assume that the distance from station A to B is 420km. Each half is 210km.

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When the car travels from B to the halfway point, it takes 210/30 = 7 hours.

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3 0
4 years ago
Sound travels at about 360 meters/sec. What is the wavelength of sound with a
ollegr [7]

<u>Answer:</u>

0.24 m

<u>Explanation:</u>

Given:

Wave velocity ( v ) = 360 m / sec

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We have to calculate wavelength ( λ ):

We know:

v = λ / t [ f = 1 / t ]

v = λ f

= > λ = v / f

Putting values here we get:

= > λ = 360 / 1500 m

= > λ = 36 / 150 m

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Hence, wavelength of sound is 0.24 m.

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3 years ago
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