Which of the following is the most important reason why simple harmonic motion will not continue forever in most real-world situations?
a. frictional effects dissipate energy.
b. the restoring force is not strong enough.
c. real-world objects have small spring constants.
d. gravitational forces slow the motion of the object.

If steel is more dense that lake water, why can a boat float

What will a positive and a negative charge do if they are separated from each other?

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?