Answer:
Work done, 
Explanation:
Displacement,

Force, 
Work done by the opponent do on the football player is given by :

So, the work done by the opponent do on the football player is
.
Answer:
2.5
Explanation:
The capacitance of a parallel-plate capacitor filled with dielectric is given by

where
k is the dielectric constant
is the capacitance of the capacitor without dielectric
In this problem,
is the capacitance of the capacitor in air
is the capacitance with the dielectric inserted
Solving the equation for k, we find

Answer:
Explanation:
We can see from the question that

and 
% of 
=> 
from the question
% of 
Substituting this into the equation

=> 



From the equation above


AnswerAmontons's law. If the temperature is increased, the average speed and kinetic energy of the gas molecules increase. ... If the gas volume is decreased, the container wall area decreases and the molecule-wall collision frequency increases, both of which increase the pressure exerted by the gas (Figure 1).:
Explanation: