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tangare [24]
3 years ago
9

A car accelerates uniformly from rest to a speed of 6.6 m/s in 6.5 s. Find the distance the car travels during this time.

Physics
2 answers:
andrew11 [14]3 years ago
6 0
It traveled 39.6 meters
stiks02 [169]3 years ago
3 0

Answer:

Distance covered by the car, s = 21.56 meters

Explanation:

Given that,

Initially, the car is at rest, u = 0

It reaches a speed, final speed, v = 6.6 m/s

Time, t = 6.5 s

We need to find the distance covered by the car during this time. Firstly, we can find the acceleration of the car using equation of motion as :

v=u+at

6.6=0+a\times 6.5

a=1.01\ m/s^2

Now using third equation of motion to find distance (s) as :

s=\dfrac{v^2-u^2}{2a}

s=\dfrac{(6.6)^2}{2\times 1.01}

s = 21.56 meters

So, the distance traveled by the car during 6.5 seconds is 21.56 meters. Hence, this is the required solution.

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One mol of a perfect, monatomic gas expands reversibly and isothermally at 300 K from a pressure of 10 atm to a pressure of 2 at
Zolol [24]

Answer:

Explanation:

Given

1 mole of perfect, monoatomic gas

initial Temperature(T_i)=300 K

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P_f=2 atm

Work done in iso-thermal process=P_iV_iln\frac{P_i}{P_f}

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P_f=Final Pressure

W=10\times 2.463\times ln\frac{10}{2}=39.64 J

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(b)if the gas expands by the same amount again isotherm-ally and irreversibly

work done is=P\Delta V

V_1=\frac{RT_1}{P_1}=\frac{1\times 0.0821\times 300}{10}=2.463 L

V_2=\frac{RT_2}{P_2}=\frac{1\times 0.0821\times 300}{2}=12.315 L

\Delta W=1\times (12.315-2.463)=9.852 J

\Delta q=\Delta W=9.852 J

\Delta U=0

8 0
3 years ago
a ball moves at a constant speed of 1/2 meter per second. How much time does it take the ball to move 1 meter?
lesya [120]

Answer:

2 seconds

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Explanation:

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8 0
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