Answer: D
Explanation: Look at the figure, we can conclude that the correct answer is
X: Low potential energy
Y: High potential energy
Z: Flow of electrons
Because electrons flow where there is difference in potential energy. And electrons move from a region of high potential energy to a region of low potential energy.
Since the arrow is pointing to X, that means
Z is the flow of electrons, X is of low potential energy and Y is of high potential energy.
Answer:
240 Ns
Explanation:
The momentum of an object is the product of its mass and its velocity:
where m is the mass of the object and v its velocity.
According to Newton's second Law of motion, the change in momentum of an object is related to the force applied by it by the equation:
where
F is the force exerted on the object
is the change in momentum
is the time elapsed
In this problem:
F = 120 N is the force exerted on the object
is the time elapsed
Therefore, the change in momentum of the object is: