Why do you suppose the modern horse has a longer foot than its ancestors?
a) allowed it to swim faster
b) allowed it to reach higher trees
c) allowed for greater chance of mating
d) allowed greater speed to outrun predators

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

What happens when a rubber rod is rubbed with a piece of fur?

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?