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Marysya12 [62]
3 years ago
5

A steady device in each cycle converts 155 J of work to thermal energy that is released into a reservoir at 340 K. Part A Calcul

ate the change in entropy of the environment that results from this transfer.
Physics
1 answer:
sukhopar [10]3 years ago
7 0

Answer:

change in entropy is 3.3034 × 10^{22}  

Explanation:

give data

thermal energy Q  = 155 J

temperature T = 340 K

to find out

change in entropy

solution

we know change in entropy formula that is

change in entropy = Q / ( K×T )   ..............1

here K is boltzmann constant that is 1.38 × 10^{-23} kg-m²/s²

put these value in equation 1 we get

change in entropy = Q / ( K × T )

change in entropy = 155 / (  1.38 × 10^{-23}  × 340 )

change in entropy = 3.3034 × 10^{22}  

so change in entropy is 3.3034 × 10^{22}  

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3 years ago
A ball is thrown from ground level with an initial speed of 24.5 m/s at an angle of 35.5 degrees above the horizontal. The ball
eimsori [14]

6.07 m

Explanation:

Given:

v_0=24.5\:\text{m/s}

\theta_0 = 35.5°

First, we need to find the amount of time it takes to travel a horizontal distance of 25.8 m. We know that

x = v_{0x}t \Rightarrow t = \dfrac{x}{v_0 \cos \theta_0}

or

t = 1.29\:\text{s}

To find the vertical height where the ball hit the wall, we use

y = v_{0y}t - \frac{1}{2}gt^2

\:\:\:\:=(24.5\:\text{m/s})\sin 35.5(1.29\:\text{s}) \\ - \frac{1}{2}(9.8\:\text{m/s}^2)(1.29\:\text{s})^2

\:\:\:\:=6.07\:\text{m}

7 0
3 years ago
Force of 99N and 64N act on an object of mass27 kg. what is the acceleration of the object
zimovet [89]
That all depends on the angle between the two forces.

It could be anything between 1.3 m/s² in the direction of the larger force, if
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8 0
3 years ago
Read 2 more answers
Check my answers for the physics questions above...
3241004551 [841]

I believe you've answered them correctly :)

Good luck with your quiz!

6 0
4 years ago
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Your weight on Earth is equal to the Earth's weight on you.

I can't think of a way for you to go out and see it or measure it,
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If the Earth pulls on me, then I must pull on the Earth with an
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Take a good, long, hard look at this formula for the gravitational force.

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5 0
3 years ago
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