Answer:
The value is 
Explanation:
From the question we are told that
The weight of the horizontal solid disk is
The radius of the horizontal solid disk is
The force applied by the child is
The time considered is 
Generally the mass of the horizontal solid disk is mathematically represented as

=> 
=> 
Generally the moment of inertia of the horizontal solid disk is mathematically represented as

=>
=> 
Generally the net torque experienced by the horizontal solid disk is mathematically represented as

=> 
=> 
=> 
Gnerally from kinematic equation we have that

Here
is the initial angular velocity velocity of the horizontal solid disk which is 
So

=>
Generally the kinetic energy is mathematically represented as

=> 
=> 
The answer is A. an object that allows some light to pass through
Answer:
•→ The motion of a particle or body in S.H.M acts towards a fixed point.
•→ Acceleration of the body under S.H.M is proportional to its displacement.
•→ This motion is periodic.
•→ Mechanical energy is conserved in S.H.M
Explanation:
S.H.M is Simple Harmonic Motion

Pour the entire components into water.
First the iron filings can be separated using a magnet as iron is a magnetic element.
By pouring the mixture into water, it allows the salt to dissolve in the water, while the sand will not.
Next we can run this solution through a filtration device to separate the sand from the water.
Now all that's left is to let the water evaporate so that the salt will be exposed that dissolved into the water.
I believe it is water that is the medium for beach erosion