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Setler [38]
2 years ago
5

Someone help me out with this brain pop ⚠️

Chemistry
1 answer:
erik [133]2 years ago
6 0
The answer is b because if you’re fan is blowing and you spend it the opposite way, the air will be cooler
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In a __________ change the identity of the substance is
galben [10]

Answer:

physical - arrangement of molecules changes

chemical - identity changes

Explanation:

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WILL MARK BRAINLIEST AND THANK YOU!! PLEASE HELP!!!
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c

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In a particular breed of cattle, a black coat is dominant over a red coat. If a cow with a red coat is crossed with a black bull
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3 years ago
How does the law of conservation of energy apply to the changes in potential and kinetic energy of a pencil as it falls to the f
antiseptic1488 [7]

The changes in the energy law of conservation of energy is Potential energy is converted to kinetic energy. Kinetic energy is converted into potential energy.

<h3>What is the law of conservation of energy?</h3>

Law of conservation of energy says that energy can neither be created nor destroyed, it just transformed from one form to another.

The energies are kinetic, potential, mechanical, gravitational, electrical, etc.

Thus, the changes in the energy law of conservation of energy is Potential energy is converted to kinetic energy. Kinetic energy is converted into potential energy.

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7 0
1 year ago
A gas at 400 k is placed in a 4.0 l moveable piston. The gas is cooled to 252 k. What is the new volume of the piston?
katrin [286]

Answer:

2.52L

       

Explanation:

Given parameters:

T₁  = 400K

V₁  = 4L

T₂ = 252K

unknown

V₂ = ?

Solution:

To solve this problem, we are going to apply charle's law. The law states that the volume of a fixed mass of gas is directly proportional to temperature provided pressure is constant.

Mathematically,

               \frac{V_{1} }{T_{1} }  = \frac{V_{2} }{T_{2} }

Substitute and solve for V₂

           \frac{4}{400}  = \frac{V_{2} }{252}

        V₂ = 2.52L

         

6 0
3 years ago
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