Answer:
1 W = 1 J / sec       Definition of watt is 1 joule / sec
So if a bulb uses 75 J / sec it must use 
75 J/s * 60 sec / min = 4500 J/min    energy used by bulb
If bulb is 15% efficient then the light delivered is
P = 4500 J / min * .15 = 675 J / min
 
        
             
        
        
        
Answer:
An atmosphere is the layers of gases surrounding a planet or other celestial body. Earth's atmosphere is composed of about 78% nitrogen, 21% oxygen, and one percent other gases
 
        
             
        
        
        
Answer:
Global warming and climate change
 
        
             
        
        
        
Answer
given,
resistance = 0.05 Ω 
internal resistance of battery = 0.01 Ω 
electromotive force = 12 V
a) ohm's law
         V = IR
      and volage
     
 
now, 
     
 
    
     
 
inserting the values
     
 
       I = 200 A
b) Voltage
    V = I R
    V = 200 x 0.05
    V = 10 V
c) Power 
     P = I V
     P = 200 x 10 = 2000 W
d) total resistance = 0.05 + 0.09 = 0.14 Ω
   
 
     
 
      I = 80 A
      V = 80 x 0.05 = 4 V
      P = 4 x 80 = 320 W
 
        
                    
             
        
        
        
Answer:
Negatively charged or positively charged atom is generally termed as ANION/CATION. Short Explanation: If an atom loses electrons or gains protons, it will have a net positive charge and is called a Cation. If an atom gains electrons or loses protons, it will have a net negative charge and is called an Anion.
Explanation: