Answer:
7.344 s
Explanation:
A = 0.15 x 0.3 m^2 = 0.045 m^2
N = 240 
e = - 2.5 v 
B1 = 0.1 T 
B2 = 1.8 T 
ΔB = B2 - B1 = 1.8 - 0.1 = 1.7 T 
Δt = ?
e = - dФ/dt
e = - N x A x ΔB/Δt
- 2.5 = - 240 x 0.045 x 1.7 / Δt 
2.5 = 18.36 / Δt 
Δt = 7.344 s
 
        
             
        
        
        
Answer:
Explanation:
When a force hits something, an equal amount of force is exerted back on it.
 
        
                    
             
        
        
        
To solve this problem we will apply the concepts related to wavelength as the rate of change of the speed of the wave over the frequency. Mathematically this is

Here,
v = Wave velocity
f = Frequency,
Replacing with our values we have that,

\lambda = 0.68m 
The distance to move one speaker is half this

Therefore the minimum distance will be 0.34m
 
        
             
        
        
        
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