Answer:
103.1 V
Explanation:
We are given that 
Initial circumference=C=168 cm

Magnetic field,B=0.9 T
We have to find the magnitude of the  emf induced in the loop after exactly time 8 s has passed since the circumference of the loop started to decrease.
Magnetic flux=
Circumference,C=

 cm
 cm



When t=0



E=

t=8 s
B=0.9


 
        
             
        
        
        
Answer:
photoelectric effect
Explanation:
When the energy from photons is absorbed by matter, the matter can emit electrons. This process is called the photoelectric effect. The photoelectric effect is a property of light that is not explained by the theory that light is a wave.
 
        
             
        
        
        
Answer:
 Fr^2 = 75.9N+105.8N=181.7
<u><em>Fr = </em></u><u><em>181.7N.</em></u>
 
        
             
        
        
        
The position of the first ball is

while the position of the second ball, thrown with initial velocity  , is
, is

The time it takes for the first ball to reach the halfway point satisfies



We want the second ball to reach the same height at the same time, so that



