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3 years ago

The motion of a car on a position time graph is represent with a horizontal line . What does this indicate about the cars motion

Physics

2 answers:

siniylev [52]3 years ago

5 0

It indicates that car is at rest at all time (t) :-) Hope it helped you. ✌

4vir4ik [10]3 years ago

3 0

A horizontal line on a position/time graph means that the car's position
doesn't change as time goes by. This is a pretty good indication that
the car is either stopped at a red light, or else parked in the driveway.
It isn't moving.

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3 years ago

On a hot summer day, 3.50 ✕ 106 J of heat transfer into a parked car takes place, increasing its temperature from 36.5°C to 44.4

anygoal [31]

Answer:

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

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

Explanation:

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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)

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

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

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

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

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3 years ago

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