The answer of temperature change is mentioned below
<h3>
What is Temperature Change ?</h3>
The change in temperature is given by
ΔT=Final Temperature −Initial Temperature
Measurements of temperature
It is a measure of the degree of hotness or coldness of a body
To determine temperature changes,
the initial and final temperature of the iron and water is recorded.
For Iron
Iron at higher temperature is dipped in water
Water is at lower temperature so there will be change in temperature fo both
These data are recorded
Temperature change = Final temperature - Initial temperature.
a) Temperature change for metal = 200 - 100 = 100 0C
Temperature change for water = 22.5
Temperature change for both = 23.3
b) For water 0.7
For iron Metal 76.6
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Mechanical Energy
Mechanism energy is the energy associated with the position and motion of an object. Therefore it is also the summation of the kinetic and potential energies of the object.
Explanation:
Mechanism energy is the energy associated with the position and motion of an object. Therefore it is also the summation of the kinetic and potential energies of the object.
In the muscles, to have movement, the chemical bonds in ATP is broken to enable the sliding action of the myosin and actin fibres of a sarcomere (the basic unit of muscle). This sliding action is responsible for contraction of muscle. The coordinated contractions and relaxations of sarcomeres on muscles result in movement which translates to mechanical energy.
This process is never 100% efficient with some energy lost as heat energy.
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<u>Answer:</u> The standard Gibbs free energy of the reaction is -15.8 kJ/mol
<u>Explanation:</u>
Relation between standard Gibbs free energy and equilibrium constant follows:
where,
= Standard Gibbs free energy = ?
R = Gas constant =
T = temperature = 298 K
= equilibrium constant = 581
Putting values in above equation, we get:
Conversion factor used: 1 kJ = 1000 J
Hence, the standard Gibbs free energy of the reaction is -15.8 kJ/mol
Answer:
Different forces between atoms and difference in structure.
Beta radiation takes the form of either an electron or a positron (a particle with the size and mass of an electron, but with a positive charge) being emitted from an atom. Due to the smaller mass, it is able to travel further in air, up to a few meters, and can be stopped by a thick piece of plastic, or even a stack of paper. It can penetrate skin a few centimeters, posing somewhat of an external health risk. However, the main threat is still primarily from internal emission from ingested material.