L = length of the incline = 75 m 
θ = angle of incline = 22 deg
h = height of skier at the top of incline = L Sinθ = (75) Sin22 = 28.1 m
μ = Coefficient of friction = 0.090
N = normal force by the surface of incline 
mg Cosθ = Component of weight of skier normal to the surface of incline opposite to normal force N 
normal force "N" balances the component of weight opposite to it hence we get 
N = mg Cosθ
frictional force acting on the skier is given as 
f = μN
f = μmg Cosθ
v = speed of skier at the bottom of incline 
Using conservation of energy 
potential energy at the top of incline = kinetic energy at the bottom + work done by frictional force 
mgh = f L + (0.5) m v²
mgh = μmg Cosθ L + (0.5) m v²
gh = μg Cosθ L + (0.5) v²
(9.8 x 28.1) = (0.09 x 9.8 x 75) Cos22 + (0.5) v²
v = 20.7 m/s 
 
        
             
        
        
        
When a large rock is weathered into tiny pieces which add up the weight of the original rock, this demonstrates the law of conservation of matter. 
According to this law the mass of an object doesn't change with time and also it does not depends on how the particles are arranged themselves.
Hence, option (C) is correct.
 
        
             
        
        
        
Gravity on the surface of sun is given as

here we know that


now we will have


now we need to find the ratio of weight on surface of sun and on surface of Earth


so weight will increase by 28 times
 
        
             
        
        
        
Hence the expression of ω in terms of m and k is 

Given the expressions;

Equating both expressions we will have;

Divide both equations by 2π

Square both sides

Take the square root of both sides

Hence the expression of ω in terms of m and k is 

 
        
             
        
        
        
One way that the world's ocean affects weather and climate is by playing an important role in keeping our planet warm. ... The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe. When water molecules are heated, they exchange freely with the air in a process called evaporation.