Answer:
90 hp
Explanation:
Power = work / time
P = ½ (1500 kg) (25 m/s)² / 7.0 s
P = 67,000 W
P = 90 hp
 
        
             
        
        
        
Answer:
change in internal energy 3.62*10^5 J kg^{-1}
change in enthalapy  5.07*10^5 J kg^{-1}
change in entropy 382.79 J kg^{-1} K^{-1}
Explanation:
adiabatic constant 
specific heat is given as 
gas constant =287 J⋅kg−1⋅K−1

 specific heat at constant volume

change in internal energy 
                             
change in enthalapy 
                                  
change in entropy 



 
        
             
        
        
        
Answer:
The biggest factor affecting coastal erosion is the strength of the waves breaking along the coastline. A wave's strength is controlled by its fetch and the wind speed. Longer fetches & stronger winds create bigger, more powerful waves that have more erosive power.
Explanation:
hope it helps !
 
        
                    
             
        
        
        
Answer:
the speed after 3 seconds is 10 m/s
Explanation:
The computation of the speed is shown below:
As we know that 
V = U  + at
Here,
U = 34 m/s
a =  - 8 m/s²
t = 3 Sec
V = velocity after 3 sec
V  = 34 + (-8)3
  = 34 - 24
  V = 10 m/s
Hence, the speed after 3 seconds is 10 m/s
 
        
             
        
        
        
When the capacitor is connected to the voltage, a charge Q is stored on its plates. Calling  the capacitance of the capacitor in air, the charge Q, the capacitance
 the capacitance of the capacitor in air, the charge Q, the capacitance  and the voltage (
 and the voltage ( ) are related by
) are related by
 (1)
 (1)
when the source is disconnected the charge Q remains on the capacitor. 
When the space between the plates is filled with mica, the capacitance of the capacitor increases by a factor 5.4 (the permittivity of the mica compared to that of the air):

this is the new capacitance. Since the charge Q on the plates remains the same, by using eq. (1) we can find the new voltage across the capacitor:

And since  , substituting into the previous equation, we find:
, substituting into the previous equation, we find:
