Answer:
Induced emf, 
Explanation:
The varying magnetic field with time t is given by according to equation as :

Where
 are constant
 are constant
Let  is the emf induced in the loop as a function of time. We know that the rate of change of magnetic flux is equal to the induced emf as:
 is the emf induced in the loop as a function of time. We know that the rate of change of magnetic flux is equal to the induced emf as:





So, the induced emf in the loop as a function of time is  . Hence, this is the required solution.
. Hence, this is the required solution.
 
        
             
        
        
        
... then your weight is <em>25.2 lbf</em> on the moon.
 
        
             
        
        
        
Answer: 
1.) U = 39.2 m/s
2.) t = 4s
Explanation: Given that the 
height H = 78.4m
The projectile is fired vertically upwards under the acceleration due to gravity g = 9.8 m/s^2
Let's assume that the maximum height = 78.4m. And at maximum height, final velocity V = 0
Velocity of projections can be achieved by using the formula 
V^2 = U^2 - 2gH 
g will be negative as the object is moving against the gravity 
0 = U^2 - 2 × 9.8 × 78.4
U^2 = 1536.64
U = sqrt( 1536.64 )
U = 39.2 m/s
The time it takes to reach its highest point can be calculated by using the formula;
V = U - gt
Where V = 0
Substitute U and t into the formula 
0 = 39.2 - 9.8 × t
9.8t = 39.2
t = 39.2/9.8
t = 4 seconds. 
 
        
             
        
        
        
Given 
v = 343 m/s 
ac = 5g
ac = 5*9.8 m/s^2
ac = 49 m/s^2
where, 
v: velocity 
ac = centripetal aceleration 
Procedure 
We call the acceleration of an object moving in uniform circular motion—resulting from a net external force—the centripetal acceleration ac; centripetal means “toward the center” or “center seeking”.
Formula 

The minimum radius not to exceed the centripetal acceleration is 2401 m.