All matter is composed of atoms, indestructible building blocks.
Answer:
The average power developed by a motor is 4905 Watts.
Explanation:
The average power is given by:
Where:
W: is the work
t: is the time = 8.0 s
First, let's find the work:
Where:
F: is the force
d: is the displacement = 10.0 m
The force is in the vertical motion, and since the movement of the mass is at constant speed the force is:
Hence, the average power is:
Therefore, the average power developed by a motor is 4905 Watts.
I hope it helps you!
The answer is A. When the the temperature increases the kinetic energy increases
<span>As the charged insulating rod approaches the sphere (not in contact), free electrons in the sphere move. If the rod is negatively charged, free electrons move to the side of the sphere opposite the side with the rod. If the rod is positively charged, the free electron moves to the side of the sphere with the rod. In either case, the region of the sphere near the rod acquires a charge with the sign opposite to that on the rod.
a. Since opposedly charged objects always attract each other, the rod and ball always experience mutual attractive forces.
b. Since
the side of the sphere near the bar always has the opposite charge to
the charge of the rod, the rod and the sphere always attract each other. <span>They do not repel each other.</span></span>
