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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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What is the momentum of an object that is traveling at 3 m/s and has a mass of 5 kg?
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Answer:

Momentum of the object = 15 kg.m/s

Explanation:

Given

mass, m = 5 kg

speed, v = 3 m/s

momentum, p = ?

We know that the momentum is given by the equation:

p = mv

  = 5 kg x 3 m/s

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4 years ago
_____ is a measure of the force of gravity pulling down on an object. it is measured in newtons (N), the common unit for measuri
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What is mechanics? Give name of its two sub branch?
kap26 [50]

Answer:

Mechanics is the branch of physics which deals with the motion of objects its causes and effects.

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Explanation:

3 0
3 years ago
A 0.5 m diameter wagon wheel consists of a thin rim having a mass of 7 kg and six spokes, each with a mass of 1.2 kg. 1.2 kg 7 k
Arte-miy333 [17]

Explanation:

It is given that,

Mass of the rim of wheel, m₁ = 7 kg

Mass of one spoke, m₂ = 1.2 kg

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Let I is the the moment of inertia of the wagon wheel for rotation about its axis.

We know that the moment of inertia of the ring is given by :

I_1=m_1r^2

I_1=7\times (0.25)^2=0.437\ kgm^2

The moment of inertia of the rod about one end is given by :

I_2=\dfrac{m_2l^2}{3}

l = r

I_2=\dfrac{m_2r^2}{3}

I_2=\dfrac{1.2\times (0.25)^2}{3}=0.025\ kgm^2

For 6 spokes, I_2=0.025\times 6=0.15\ kgm^2

So, the net moment of inertia of the wagon is :

I=I_1+I_2

I=0.437+0.15=0.587\ kgm^2

So, the moment of inertia of the wagon wheel for rotation about its axis is 0.587\ kgm^2. Hence, this is the required solution.

4 0
4 years ago
Heres some earned points
egoroff_w [7]

Answer:

what do you mean by that.

5 0
2 years ago
Read 2 more answers
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