Efficiency is completing a task as fast a possible the the least amount of effort.
        
                    
             
        
        
        
Answer:
C
Explanation:
If a pulley system has an efficiency of 74.2%, then only that fraction of the work performed will be useful. 74.2%=0.742. 0.742*200 is about 148J. Hope this helps!
 
        
             
        
        
        
Answer:
Capacitance of the second capacitor = 2C
Explanation:

Where A is the area, d is the gap between plates and ε₀ is the dielectric constant.
Let C₁ be the capacitance of first capacitor with area A₁ and gap between plates d₁.
We have    
               
Similarly for capacitor 2
                
Capacitance of the second capacitor = 2C
 
        
             
        
        
        
A nebula is gas, dust, and other things that form and form some sort of clould like thing. It also looks cool because of the colors it produces. I'm sure you could do a web search to find more about it, I don't take astronomy hahaha
        
             
        
        
        
Answer:
Net forces which pushes the window is 30342.78 N.
Explanation:
Given:
Dimension of the office window.
Length of the window =  m
 m
Width of the window =  m
 m
Area of the window = 
Difference in air pressure = Inside pressure - Outside pressure 
                                            =  atm =
 atm =  atm
 atm
Conversion of the pressure in its SI unit.
⇒   atm =
 atm =  Pa
 Pa
⇒  atm =
 atm =  Pa
 Pa
We have to find the net force.
We know,
 ⇒ Pressure = Force/Area
⇒ 
⇒ 
⇒ Plugging the values.
⇒  
 
⇒  Newton (N)
 Newton (N)
So,
The net forces which pushes the window is 30342.78 N.