Answer:
1375J
Explanation:
The gravitational potential/potential energy of the at the top of the tree which is the energy by virtue of its position.
P.E = mgh
mass = m
Acceleration due to gravity = g
height = h
At the top of the tree, the value of h (height) is high resulting in the gravitational potential. When the cat lands on the ground, the value of h is zero, the the gravitational potential would be zero and all the potential energy have been converted to other forms of energy.
Therefore, the total gravitational potential store is equal to the maximum amount of energy that can be transferred which is equal to 1375J.
 
        
             
        
        
        
This question is personal preference... just answer with whatever YOU think, there probably isn’t s wrong answer if I’d guess.
        
             
        
        
        
Slide tackle, goalkeeping, avoiding getting tackled, controlling the ball in the air, shooting from a hard angle etc
        
             
        
        
        
When the light falls on a soap bubble spread on a water puddle, and a spectrum of color is observed due to constructive and destructive of light waves which means option (3) is correct. Light waves interfere into each other to produce a spectrum which consists of bright and dark fringes.
 
        
             
        
        
        
Answer:
Frequency 
Explanation:
The property of waves that remains unchanged as it crosses the boundary of one medium to another is the frequency of the wave. 
As a wave moves from one boundary to another, the wavelength and the speed of the wave changes. 
The speed of the wave is product of wavelength and frequency. Also, the wavelength of the wave is function of the distance between successive crests or troughs of a wave. 
The frequency of a wave is the number of waves that crosses a medium per unit of time.