Answer:
Explanation:
From the question we are told that
Run speed of Ilya and Anya 
Walk speed of Ilya and Anya 
Total distance 
Anya Walks 1/2d and runs 1/2d
ilya walks 1/2t and runs 1/2d
Generally the distance walked by Ilay k is mathematically given by
Since ilya walks 1/2t and runs 1/2t
Therefore
Therefore llay runing distance is m
a)Generally the Time walked by Anya 
is mathematically given by
Anya Walks 1/2d and runs 1/2d
Therefore
b)Generally the average speed of Anya S_A is mathematically given as
Generally the time taken b y llay 
is mathematically given by
Answer:
assertion is true but the reason is not true
Explanation:
Answer:
a) 1.25e15 kg
b) 4.17e20 J
c) 44.55 years
Explanation:
To find the volume you need to multiply 218 km * 25 km * 250 m (be careful with units), so the volume is 1.3625e12 m^3, if you multiply this value by the density you will obtain the mass, that is 1.25e15 kg.
To find the energy needed to melt the ice, you use the latent heat, in this case, it is 3.34e5 J/kg. Now you multiply this value by the mass, so you need 4.17e20 J to melt the iceberg.
The surface area of the iceberg is 545e7 m^2, so the ice absorbs 594e9 W, one W is one J/s, so in 12 hours the iceberg absorbs 2.56e16 J, so in 365 days absorbs 9.36e18 J. Now you just divide 4.17e20 J by the amount f energy per year, and obtain 44.55 years.
In order to determine the angle of the refracted ray, we may apply Snell's law, which states that the ratio of the sines of the angles of incidence and refraction is constant for a given wave when it passes through two different media. Mathematically, this is:
n₁sin(∅₁) = n₂sin(∅₂)
Where n is the refractive index. Substituting the values given into the equation:
1.0003 * sin(20°) = 1.33 * sin(∅)
∅ = 14.91
The angle of the refracted ray is 15°.
