Answer:
c. is more than that of the fluid.
Explanation:
This problem is based on the conservation of energy and the concept of thermal equilibrium
![heat= m s \Delta T ](https://tex.z-dn.net/?f=heat%3D%20m%20s%20%5CDelta%20T%0A)
m= mass
s= specific heat
\DeltaT=change in temperature
let s1= specific heat of solid and s2= specific heat of liquid
then
Heat lost by solid= ![20(s_1)(70-30)=800s_1 ](https://tex.z-dn.net/?f=20%28s_1%29%2870-30%29%3D800s_1%0A)
Heat gained by fluid=![100(s_2)(30-20)=1000s_2 ](https://tex.z-dn.net/?f=100%28s_2%29%2830-20%29%3D1000s_2%0A)
Now heat gained = heat lost
therefore,
1000 S_2=800 S_1
S_1=1.25 S_2
so the specific heat of solid is more than that of the fluid.
Answer:
448 meters
Explanation:
every second it moves 8 meters, so all you have to do is multiply 56x8 or 8x56 either way it is the same thing and you will get the same answer
The vector sum of forces acting on a non-accelerating object equals zero.
equation form: ΣF = 0
Answer:
Explanation:
Point beneath you forms a beautiful iridescent green
refractive index of Gasoline ![n=1.38](https://tex.z-dn.net/?f=n%3D1.38)
Wavelength of Green light is ![\lambda =540\ nm](https://tex.z-dn.net/?f=%5Clambda%20%3D540%5C%20nm)
Here light first traverse from air(n=1) to gasoline , it reflects from front surface of gasoline(n=1.38) so it suffers a phase change. After this light reflect from rear surface of gasoline and there is a decrease in refractive index(n=1.38 to n=1.33), so there is no phase change occurs .
For constructive interference
![2t=(m+\frac{1}{2})\cdot \frac{\lambda }{n}](https://tex.z-dn.net/?f=2t%3D%28m%2B%5Cfrac%7B1%7D%7B2%7D%29%5Ccdot%20%5Cfrac%7B%5Clambda%20%7D%7Bn%7D)
here t= thickness of gasoline film
n=refractive index
for ![m=0](https://tex.z-dn.net/?f=m%3D0)
![t=\frac{\lambda }{4n}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B%5Clambda%20%7D%7B4n%7D)
![t=\frac{540}{4\times 1.38}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B540%7D%7B4%5Ctimes%201.38%7D)
The original Clean Air Act of 1970 gave the US EPA board authority to regulate motor vehicle pollution and the agencies emission control policies and requirements have become progressively more stringent since then