Let me think about this........ correct me if I am wrong.......
Laws of thermodynamics
1) Energy cannot be created nor destroyed. It is transferred.
2) All spontaneous reactions will increased the entropy of the universe (More disorder)
3) The entropy of the crystal lattice structure at 0 K is zero
PE(coal) --> Steam(K.E) ................ This will increase entropy and also conversion of energy. So BOTH LAWS is my final answer.
Wait...... I would like to use a lifelines...... I want to phone my Physical chem professor.
*Ring Ring.........*
Me: Hello, I wanted to make sure if I got the correct answer.
Chem prof: You dont need my help, since you got the right answer.
Me: WOOT!!!!!!!
Most likely answer would be A
Answer:
a).
The magnitude force impulse is
![F=656.6 kg*m/s](https://tex.z-dn.net/?f=F%3D656.6%20kg%2Am%2Fs)
the average force is
![F=656.6 kg*m/s](https://tex.z-dn.net/?f=F%3D656.6%20kg%2Am%2Fs)
Explanation:
Using the conservation energy the potential energy in the high is equal to the kinetic energy just before the collision so:
![E_K=E_p](https://tex.z-dn.net/?f=E_K%3DE_p)
![\frac{1}{2}*m*v^2=m*g*h](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%2Am%2Av%5E2%3Dm%2Ag%2Ah)
Notice the mass can be cancel as a factor so:
![v^2=2*g*h](https://tex.z-dn.net/?f=v%5E2%3D2%2Ag%2Ah)
![v=\sqrt{2*g*h}=\sqrt{2*9.8m/s^2*0.50m}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B2%2Ag%2Ah%7D%3D%5Csqrt%7B2%2A9.8m%2Fs%5E2%2A0.50m%7D)
![v=9.8 m/s](https://tex.z-dn.net/?f=v%3D9.8%20m%2Fs)
Now the impulse is determinate by:
![F=m*(v_f-(-v_i))](https://tex.z-dn.net/?f=F%3Dm%2A%28v_f-%28-v_i%29%29)
![kg*F=m*v_i=67*9.8m/s](https://tex.z-dn.net/?f=kg%2AF%3Dm%2Av_i%3D67%2A9.8m%2Fs)
![F=656.6 kg*m/s](https://tex.z-dn.net/?f=F%3D656.6%20kg%2Am%2Fs)
The average force is also
![F'=\frac{F}{t}=\frac{656.6}{0.095s}](https://tex.z-dn.net/?f=F%27%3D%5Cfrac%7BF%7D%7Bt%7D%3D%5Cfrac%7B656.6%7D%7B0.095s%7D)
![F'=6911.57 N](https://tex.z-dn.net/?f=F%27%3D6911.57%20N)
Answer:
<h2>Acceleration: </h2>
The rate of change of velocity is acceleration. Like velocity, acceleration is a vector and has both magnitude and direction. For example, a car in straight-line motion is said to have forward (positive) acceleration if it is speeding up and rearward (negative) acceleration if it is slowing down.
Explanation:
Hope it is helpful....
<span>After entering the loop, it should use the correct list size and the loop will be affected if the remove call changes the size of the list.
If lst is an Arraylist the running time of removefirsthalf is O (n^2). So when the beginning is removed the next element will move forward.
If lst is a LinkedList which is a dynamic structure the running is O (n) for removefirsthalf</span>