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ludmilkaskok [199]
3 years ago
8

A weather balloon is inflated to a volume of 26.8 LL at a pressure of 744 mmHgmmHg and a temperature of 31.2 ∘C∘C. The balloon r

ises in the atmosphere to an altitude where the pressure is 385 mmHgmmHg and the temperature is -14.8 ∘C∘C. Assuming the balloon can freely expand, calculate the volume of the balloon at this altitude.
Physics
1 answer:
elena-s [515]3 years ago
5 0

Answer:

43.96 L

Explanation:

We are given that

V_1=26.8 L

P_1=744mm Hg

T_1=31.2^{\circ} C=31.2+273=304.2K

P_2=385mmHg

T_2=-14.8^{\circ}=273-14.8=258.2K

We know that

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

V_2=\frac{P_1V_1T_2}{P_2T_1}

Substitute the values

V_2=\frac{744\times 26.8\times 258.2}{385\times 304.2}

V_2=43.96 L

Hence, the volume of balloon at -14.8 degree Celsius=43.96 L

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Answer:

<h2>38,769.23 miles</h2>

Explanation:

given:

A car is traveling at an average speed of 70 m/s.

find:

How many km would the car travel in 6.5 hrs. ?

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<u>70 mi. </u> x   <u>3600 sec.</u>  =  252,000 mi/hour

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3 years ago
Mike has a mass of 97 kg. He jumps out of a perfectly good airplane that is 2000 m above the ground. After he falls 1000 m, when
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Answer:

a)  fr = 224.3 N , b)   fr = 224.3 N , c)   v = 198.0  m/s

Explanation:

a) For this exercise let's start by calculating the acceleration in the fall

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Let's use the second net law to enter the average friction force

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            a = (v² –v₀²) / 2 (y-y₀)

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c) the speed of the wallet is searched with kinematics

           v² = v₀² - 2 g (y-y₀)

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           v = 198.0  m/s

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