Answer:
C
Explanation:
A magnet is basically a bundle of tiny magnets,magnetic domains. Each one has a tiny north and south pole. If you cut one in half, the newly cut faces will become the new north or south poles of the smaller pieces.
All objects in orbit must follow the path of an ellipse (one of Keplers laws)
Answer:
m = 82.1 kg
Explanation:
For this exercise we must use Hook's law that states that the force exerted by a spring is proportional to the displacement
Fe = -k x
Let's use Newton's second law to establish equilibrium, the elastic force up and the body weight down
Fe - W = 0
Fe = W = mg
k x = m g
m = k x / g
Let's reduce the distance to SI units
x = 25 cm (1 m / 100cm) = 0.250 m
m = 3220 0.250 /9.8
m = 82.1 kg
Gravitational potential energy is related to an object's height. The greater the height, the greater the gravitational potential energy. Therefore, the baseball has the greatest gravitational potential energy when it is at its maximum height in the air.
The center of mass is a position defined relative to an object or system of objects. It is the average position of all the parts of the system, weighted according to their masses.
For simple rigid objects with uniform density, the center of mass is located at the centroid. For example, the center of mass of a uniform disc shape would be at its center. Sometimes the center of mass doesn't fall anywhere on the object. The center of mass of a ring for example is located at its center, where there isn't any material.
