Retrograde. Planets seem to move forward and then backward sometimes. This is really because we pass them as we move in our orbit but astronomers wanted to try to describe the solar system with earth at the center so elaborate models were employed.
I'm 85 percent sure it's d. !
And exAMPLE WOULD BE SOUND WAVES
Answer:
i) Heat required to raise temperature of iron is
![Q_{iron} = 7.55 \times 10^6 J](https://tex.z-dn.net/?f=Q_%7Biron%7D%20%3D%207.55%20%5Ctimes%2010%5E6%20J)
ii) Heat require to raise temperature of copper is
![Q_{copper} = 6.79 \times 10^6 J](https://tex.z-dn.net/?f=Q_%7Bcopper%7D%20%3D%206.79%20%5Ctimes%2010%5E6%20J)
iii) Heat require to raise temperature of tungsten is
![Q_{tung} = 2.36 \times 10^6 J](https://tex.z-dn.net/?f=Q_%7Btung%7D%20%3D%202.36%20%5Ctimes%2010%5E6%20J)
Explanation:
As we know that specific heat capacity of
i) Iron is 444 J/kg C
so heat required to raise its temperature is given as
![Q_{iron} = m s \Delta T](https://tex.z-dn.net/?f=Q_%7Biron%7D%20%3D%20m%20s%20%5CDelta%20T)
![Q_{iron} = 210(444)(91 - 10)](https://tex.z-dn.net/?f=Q_%7Biron%7D%20%3D%20210%28444%29%2891%20-%2010%29)
![Q_{iron} = 7.55 \times 10^6 J](https://tex.z-dn.net/?f=Q_%7Biron%7D%20%3D%207.55%20%5Ctimes%2010%5E6%20J)
ii) Copper specific heat is 385 J/kg C
so heat required to raise its temperature is given as
![Q_{copper} = m s \Delta T](https://tex.z-dn.net/?f=Q_%7Bcopper%7D%20%3D%20m%20s%20%5CDelta%20T)
![Q_{copper} = 210(385)(97 - 13)](https://tex.z-dn.net/?f=Q_%7Bcopper%7D%20%3D%20210%28385%29%2897%20-%2013%29)
![Q_{copper} = 6.79 \times 10^6 J](https://tex.z-dn.net/?f=Q_%7Bcopper%7D%20%3D%206.79%20%5Ctimes%2010%5E6%20J)
iii) Tungsten specific heat capacity is given as 134 J/kg C
![Q_{tung} = m s \Delta T](https://tex.z-dn.net/?f=Q_%7Btung%7D%20%3D%20m%20s%20%5CDelta%20T)
![Q_{tung} = 210(134)(98 - 14)](https://tex.z-dn.net/?f=Q_%7Btung%7D%20%3D%20210%28134%29%2898%20-%2014%29)
![Q_{tung} = 2.36 \times 10^6 J](https://tex.z-dn.net/?f=Q_%7Btung%7D%20%3D%202.36%20%5Ctimes%2010%5E6%20J)
Answer:
a. verify that your observations are correct
c. think about what else might cause the observed discrepancy
Explanation:
Let's begin by explaining that a law is an affirmation (something established) based on repeated long-term observation of a phenomenon that has been studied and verified.
That is: A law is present in all known theories and therefore is considered universal. In addition, <u>a law can not be refuted, nor changed, because its precepts have been proven through various studies.</u>
Then, based on what is explained above, Kepler's laws of planetary motion exist because they were rigorously tested and verified, therefore they can not be refuted.
So, if we have a small discrepancy between the predicted and actual positions of Uranus after using Kepler's laws, we have to verify carefully our observations again and search what might be causing that discrepancy. But we cannot assume Kepler's Laws are incorrecto or need modifications.
In addition, we cannot consider that Uranus may not be a planet, because the discrepancy is small. In fact, this discrepancy lead to the discovery of another planet, Neptune.