Answer:
It is the most common and practical type of stretching.
Explanation:
Proprioceptive neuromuscular facilitation (PNF) is a very common and practical method of stretching that promotes and accelerates the response of neuromuscular mechanisms through the stimulation of receptors in the nervous system. It is based on the use of movements and postures for therapeutic purposes and seeks to understand movement and normal posture to perform learning or relearning when these movements or posture are altered.
Answer:
A. Heat flowing from cold to hot
Explanation:
The second law of thermodynamics speaks about entropy and directions of processes. These directions go only in one direction, just as time moves only in one direction, as we know it. It is impossible to see time moving forward in a different sense. In the same way, the processes associated with heat transfer, go in a single direction this direction is associated with bodies at different temperatures. Where heat is transferred from a higher temperature body to a lower temperature body.
Heat transfer processes from a cold body to a hot body, do not exist and can not be achieved in a natural way.
The answer is if matter is created or destroyed :) Hope this helped you out at least some
Answer:
The emissivity of the radiation shield is
Explanation:
From the question we are told that
The temperature of the first parallel plate is
The temperature of the second parallel plate is
The emissivity of first plate is
The emissivity of first plate is
Generally the total radiation heat that is been transferred without the shield is mathematically represented as
Where is the Stefan-Boltzmann constant which has a value
Substituting values
From the question we are told the that using the radiation shield would reduce the radiation heat transfer by 15%
So the new heat transfer is
So
Now this new radiation heat transfer can be mathematically represented as
Where the emissivity of the radiation shield and n is the number of radiation shield
Substituting values
Answer:
Fun facts about matter
States of Matter: Facts
Matter is all around us. Matter is the air you are breathing. ...
Solids. Matter that is composed of atoms packed tightly together are known as solids. ...
Liquids. Liquids do not hold their shape at room temperature. ...
Gases. ...
Change of State. ...
More About Atoms. ...
Elements. ...
Compounds.