Answer:
Explanation:
The difference in time will be due to travel through atmosphere where speed of light slows down. If t be the thickness of atmosphere and c be the speed of light in space and μ be the refractive index of atmosphere difference in travel time will be as follows .
difference = \frac{2t\mu }{c}-\frac{2t }{c}
=\frac{2t}{c }\left ( 1-\mu \right )
Now t = 40 x 10³m ,μ = 1.000293 , c = 3 x 10⁸.
difference =\frac{2t\mu }{c}-\frac{2t }{c}
=\frac{2t}{c }\left ( \mu -1 \right )\\
=\frac{ 2\times 40\times 10^3}{3\times10^3 }\left ( 1.000293-1 \right )\\
=7.81\times 10^{-3}
s
Answer:
Area of plot in hectare = 100 hectare
Explanation:
Given;
Length of plot = 2 km
Width of plot = 1/2 km = 0.5 km
Find:
Area of plot in hectare
Computation:
Area of plot = Length x width
Area of plot = 2 x 0.5
Area of plot = 1 square kilometer
1 square kilometer = 100 hectare
Area of plot in hectare = 1 x 100
Area of plot in hectare = 100 hectare
This law demonstrates that the energy within a close system may be converted from one form to another, but it cannot be created nor destroyed.
Answer:
Explanation:
Let the critical angle be C .
sinC = 1 / μ where μ is index of refraction .
sinC = 1 /1.2
= .833
C = 56°
Then angle of refraction r = 90 - 56 = 34 ( see the image in attached file )
sin i / sinr = 1.2 , i is angle of incidence
sini = 1.2 x sinr = 1.2 x sin 34 = .67
i = 42°.
Answer:
There is no friction between the card and the cup.
Explanation:
