Answer:
Explanation:
Hello!
In this case, for this melting process, we can identify two sub-processes in order to take the stainless steel from solid to liquid:
1. Heat up from 298.15 K to 1673 K.
2. Undergo the phase transition.
Both process have an associated enthalpy as shown below:
Therefore, the required heat is:
Notice the problem is not providing neither the mass or volume, that is why we assumed the mass is 1 g; however, it can be changed to the mass you are given.
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Answer:
<em>When the speed is doubled, K = 100 J, when the speed is tripled, K = 225 J</em>
Explanation:
<u>Kinetic Energy </u>
Is the type of energy an object has due to its speed. It's proportional to the square of the speed.
The equation for the kinetic energy is:
Where:
m = mass of the object
v = speed at which the object moves
The kinetic energy is expressed in Joules (J)
The object has a kinetic energy of K=25 J when moving at v=5 m/s, thus the mass can be calculated by solving for m:
m = 2 Kg
If the speed is doubled, v=10 m/s, the new kinetic energy is:
K = 100 J
If the speed is tripled, v=15 m/s, the new kinetic energy is:
K = 225 J
When the speed is doubled, K = 100 J, when the speed is tripled, K = 225 J