Aroller coaster car rapidly picks up speed as it
rolls down a hlope. as it starts down the slope,
its speed is 4 m/s. but 3 seconds later, at the
bottom of the slope, its speed is 22 m/s. what is
the car’s acceleration?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

In a system, when potential energy decreases, then entropy also decreases. true false

Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.