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DerKrebs [107]
3 years ago
10

A person riding north on a bicycle speeds up from 0 m/s to 9 m/s in 3 seconds. The acceleration of the bicycle is m/s2.

Physics
2 answers:
MariettaO [177]3 years ago
4 0

Answer:

3

Explanation:

on edg

Elis [28]3 years ago
3 0

Answer:

3 m/s^2

Explanation:

Time: 3 sec

Initial velocity: 0m/s

Final velocity: 9 m/s

Formula for acceleration:

a = <u>Vf - Vi</u>

         t

a = <u>9 - 0</u>

        3

a = 9/3

a = 3 m/s^2

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anygoal [31]

Answer:

a) \Delta s=443037.9747\ J.K^{-1}

b) \Delta s=31868131.8681\ J.K^{-1}

Explanation:

a)

Given:

amount of heat transfer occurred,dQ=3.5\times 10^6\ J

initial temperature of car, T_i=36.5+273=309.5\ K

final temperature of car, T_f=44.4+273=317.4\ K

We know that the change in entropy is given by:

\Delta s=\frac{dQ}{T_f-T_i}

\Delta s=\frac{3.5\times 10^6}{(44.4-36.5)} (heat is transferred into the system of car)

\Delta s=443037.9747\ J.K^{-1}

b)

amount of heat transfer form the system of house, dQ=5.8\times 10^8\ J

initial temperature of house, T_i=23.5+273=296.5\ K

final temperature of house, T_f=5.3+273=278.3\ K

\Delta s=\frac{dQ}{T_f-T_i}

\Delta s=\frac{5.8\times 10^8}{278.3-296.5}

\Delta s=31868131.8681\ J.K^{-1}

6 0
3 years ago
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