That's the description of a ground fault circuit interrupter (GFCI).
The choices you posted seem to belong to a different question.
Answer:
at point F
Explanation:
To know the point in which the pendulum has the greatest potential energy you can assume that the zero reference of the gravitational energy (it is mandatory to define it) is at the bottom of the pendulum.
Then, when the pendulum reaches it maximum height in its motion the gravitational potential energy is
U = mgh
m: mass of the pendulum
g: gravitational constant
The greatest value is obtained when the pendulum reaches y=h
Furthermore, at this point the pendulum stops to come back in ts motion and then the speed is zero, and so, the kinetic energy (K=1/mv^2=0).
A) answer, at point F
Answer:
C. 50%
Explanation:
Lets consider that the mass of taffy is m and its initial velocity is u and final velocity is v. Momentum is conserved so we can write it as,
The initial kinetic energy = 
As the Kinetic energy partly converted into heat.
The final kinetic energy = 
= 
Change in the kinetic energy = 
now we can determine the fraction of kinetic energy that has turned into heat
= 
= 
= 50%
Answer:
a) Volt
Explanation:
The standard metric unit on electric potential difference is the volt.
