Answer:
The frequency of the photon is  .
.
Explanation:
Given that,
Energy  
 
We need to calculate the energy
Using relation of energy

Where,  =  energy spacing
 =  energy spacing


Put the value of h into the formula


Hence, The frequency of the photon is  .
.
 
        
             
        
        
        
As it is given that the air bag deploy in time

total distance moved by the front face of the bag

Now we will use kinematics to find the acceleration




now as we know that

so we have

so the acceleration is 400g for the front surface of balloon
 
        
             
        
        
        
The right answer would be
 -20t+ 80
        
             
        
        
        
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
 
        
             
        
        
        
Yes because of the smoke you are creating in the air