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fiasKO [112]
2 years ago
10

a vehicle accelerates with 0.4 m/s. calculate tue time taken by the vehicle to increase its speed from 20m/s to 40m/s.​

Chemistry
2 answers:
Grace [21]2 years ago
6 0

Answer:

\huge\boxed{\sf t = 50 \ seconds}

Explanation:

<h3><u>Given data:</u></h3>

Acceleration = a = 0.4 m/s²

Initial Speed = V_i = 20 m/s

Final Speed = V_f = 40 m/s

<h3><u>Required:</u></h3>

Time = t = ?

<h3><u>Formula:</u></h3>

\displaystyle a =\frac{V_f-V_i}{t}

<h3><u>Solution:</u></h3>

Rearranging formula for t

\displaystyle t =\frac{V_f-V_i}{a} \\\\t = \frac{40-20}{0.4} \\\\t = \frac{20}{0.4} \\\\\boxed{t = 50 \ seconds}\\\\\rule[225]{225}{2}

joja [24]2 years ago
4 0

Answer:

50 seconds

Explanation:

Equation used :

<u><em>v = u + at</em></u>

<u><em /></u>

Given :

⇒ a = 0.4 m/s²

⇒ u = 20 m/s

⇒ v = 40 m/s

Solving :

⇒ 40 = 20 + 0.4t

⇒ 0.4t = 20

⇒ t = 20/0.4

⇒ t = 50 seconds

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Colt1911 [192]

The net ionic equation of chromium (iii) hydroxide reacting with nitrous acid:

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<h3>Further explanation</h3>

The electrolyte in the solution produces ions.

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For gases and solids including water (H₂O) can be written as an ionized molecule

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From the problem, it is stated that chromium (iii) hydroxide reacting with nitrous acid.

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There is an ion spectator that is 3NO₂⁻, so that if it is removed a net ionic equation will be formed:

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