The movement of electric charge
Correct answer: B). Hypertrophy
Muscles hypertrophy is a process, which involves an increase in the size of skeletal muscles. There is two type of hypertrophy, these are sarcoplasmic hypertrophy, which aims to increase muscle glycogen storage and the other one is myofibrillar hypertrophy, which increases myofibril size.
Resistance training is a type of physical training, which aims to increase the muscles strength by making muscles resistance against a force or a work. The different type of resistance training includes free weight, resistance bands and weight machines on which workout is done to build resistance.
Given:
Shaft Power, P = 7.46 kW = 7460 W
Speed, N = 1200 rpm
Shearing stress of shaft, 
= 30 MPa
Shearing stress of key, 
= 240 MPa
width of key, w = 
d is shaft diameter
Solution:
Torque, T = 
where,
= 59.365 N-m
Now,
d = 0.0216 m
Now,
w = = 
= 5.4 mm
Now, for shear stress in key
= 
we know that
T = 
= F. 
⇒ = 
⇒ 
= 
length of the rectangular key, l = 4.078 mm
