Answer:
It is directed inward, toward the center of a circle.
Answer:
the acceleration of A is three times that of B
To solve this problem we will use the heat transfer equations, to determine the amount of heat added to the body. Subsequently, through the energy ratio given by Plank, we will calculate the energy of each of the photons. The relationship between total energy and unit energy will allow us to determine the number of photons
The mass of water in the soup is 477g
The change in temperate is
![\Delta T = (90+273K)-(25+273K) = 65K](https://tex.z-dn.net/?f=%5CDelta%20T%20%3D%20%2890%2B273K%29-%2825%2B273K%29%20%3D%2065K)
Use the following equation to calculate the heat required to raise the temperature:
![q = mc\Delta T](https://tex.z-dn.net/?f=q%20%3D%20mc%5CDelta%20T)
Here,
m = Mass
c = Specific Heat
![q = (477)(4.184)(65)](https://tex.z-dn.net/?f=q%20%3D%20%28477%29%284.184%29%2865%29)
![q = 129724.92J](https://tex.z-dn.net/?f=q%20%3D%20129724.92J)
The wavelength of the ration used for heating is ![1.55*10^{-2}m](https://tex.z-dn.net/?f=1.55%2A10%5E%7B-2%7Dm)
The number of photons required is the rate between the total energy and the energy of each proton, then
![\text{Number of photons} = \frac{\text{Total Energy}}{\text{Energy of one Photon}}](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20photons%7D%20%3D%20%5Cfrac%7B%5Ctext%7BTotal%20Energy%7D%7D%7B%5Ctext%7BEnergy%20of%20one%20Photon%7D%7D)
This energy of the photon is given by the Planck's equation which say:
![E = \frac{hc}{\lambda}](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7Bhc%7D%7B%5Clambda%7D)
Here,
h = Plank's Constant
c = Velocity of light
Wavelength
Replacing,
![E = \frac{(6.626*10^{-34})(3*10^8)}{1.55*10^{-2}}](https://tex.z-dn.net/?f=E%20%3D%20%5Cfrac%7B%286.626%2A10%5E%7B-34%7D%29%283%2A10%5E8%29%7D%7B1.55%2A10%5E%7B-2%7D%7D)
![E = 1.28*10^{-23}J](https://tex.z-dn.net/?f=E%20%3D%201.28%2A10%5E%7B-23%7DJ)
Now replacing we have,
![\text{Number of photons} = \frac{82240.7}{1.28*10^{-23}}](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20photons%7D%20%3D%20%5Cfrac%7B82240.7%7D%7B1.28%2A10%5E%7B-23%7D%7D)
![\text{Number of photons} = 6.41*10^{27}](https://tex.z-dn.net/?f=%5Ctext%7BNumber%20of%20photons%7D%20%3D%206.41%2A10%5E%7B27%7D)
Therefore the number of photons required for heating is ![6.41*10^{27}](https://tex.z-dn.net/?f=6.41%2A10%5E%7B27%7D)
Answer:
It will continue moving at a constant speed because no forces are acting on it.
Explanation:
By the second law of Newton, the force is proportional to the acceleration. If there is no force, there is no acceleration. So, when the astronaut turns off the engines, the rocket will have no acceleration which means that the speed will be constant.
Therefore, the answer is:
It will continue moving at a constant speed because no forces are acting on it.
Netforce= 32-16
Unbalance
Forward