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Delicious77 [7]
3 years ago
13

Which best explains why a wood burning fireplace represents an open system

Physics
2 answers:
REY [17]3 years ago
5 0

Answer:

Explanation:

An open system is defined as the a system in which energy or mass can be gained or loss from the environment.

Here in this case a wood burning fireplace represents an open system as it is directly taking oxygen from the atmosphere.

During this direct exchange of gases heat is produced hence mass of wood is lost and oxygen is gained from the atmosphere.

So as fire is required from atmosphere to burn the wood, it best explains why a wood burning represent an open system.

-Dominant- [34]3 years ago
4 0
Because a fire requires oxygen from the atmosphere to burn 
 
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1). The object winds up in a different location.

2). Work is done.

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Galaxy A is located 200 million light-years from Earth, while galaxy B is located 600 million light-years from Earth. According
Ray Of Light [21]

Answer:

C

Explanation:

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3 years ago
What is the kinetic energy of a 100 kg object that is moving with a speed of 12.5m/s
Doss [256]

The kinetic energy of any moving object is

                           (1/2) (mass) (speed²) .

For the object you described, that's

                            (1/2) (100 kg) (12.5 m/s)²

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7 0
3 years ago
What is the direction of a vector with an x component of -12 m and a y component of 21 m?
Svet_ta [14]

Answer:

Direction= 119.74^\circ

Explanation:

<u>Displacement Vector</u>

The displacement, as every vector, has a magnitude r and a direction angle θ measured from the positive x-axis.

If we know the x-y components of the displacement, the magnitude and angle can be calculated by the equations:

r=\sqrt{x^2+y^2}

\displaystyle \tan\theta=\frac{y}{x}

The coordinates of the given vector are x=-12 m, y=21 m, thus:

\displaystyle \tan\theta=\frac{21}{-12}=-1.75

\theta=tan^{-1}(-1.75)=-60.26^\circ

Since the vector lies in the second quadrant, we add 180° to find the correct direction:

\boxed{Direction=-60.26^\circ+180^\circ= 119.74^\circ}

4 0
3 years ago
A race car's velocity increases from +28 m/s to +36 m/s over a 2.0-s time interval. What is the car's
BigorU [14]

Answer:

4 m/s^{2}

Explanation:

Acceleration, a=\frac {v-u}{t}

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Substituting 36 m/s for v, 28 m/s for u and 2 s for t then

a=\frac {36 m/s-28 m/s}{2}=4 m/s^{2}

3 0
3 years ago
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