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Gekata [30.6K]
3 years ago
7

Mary cycled at an average speed of 8 km/h. How far has she traveled if she rides for 4 hours?

Physics
2 answers:
Sati [7]3 years ago
4 0

Answer:

Which sentence from the passage shows that the function of the river depicted here has carried through to modern times?

Explanation:

Which sentence from the passage shows that the function of the river depicted here has carried through to modern times?

Lana71 [14]3 years ago
3 0
If it’s 8km/h =8x4km/1x4h= 32km/4h
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The bonds of oxygen molecules are broken by sunlight. The minimum energy required to break the oxygen-oxygen bond is 495 kJ/mol.
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Answer:

The wavelength of sunlight that can cause this bond breakage is 242 nm

Explanation:

The minimum energy of the sunlight that'll break Oxygen-oxygen bond must match 495 KJ/mol

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Each molecule of Oxygen will require (495 × 10³)/(6.02 × 10²³) = 8.22 × 10⁻¹⁹ J

E = hf

v = fλ

f = v/λ

f = frequency of the sunlight

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E = hv/λ

λ = hv/E

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λ = (6.63 × 10⁻³⁴)(3 × 10⁸)/(8.22 × 10⁻¹⁹)

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3 years ago
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kakasveta [241]

Answer:

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4 0
2 years ago
You're driving in a car at 50 km/h and bump into a car ahead traveling at 48 km/h in the same direction. the speed of impact is
salantis [7]

To solve this problem, we must remember about the law of conservation of momentum. The initial momentum mist be equal to the final momentum, that is:

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Cancelling m and substituting the v values:

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v ‘ = 49 km/h

 

<span>The speed of impact is 49 km/h.</span>

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hope this helps. good luck 
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3 years ago
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