Turn on show graph and select k vs t to see a graph of kinetic energy (e) versus time. click play and observe the graph as the car goes down the track. set hill 1 to 100 cm, hill 2 to 0 cm, and hill 3 to 99 cm. click play.
a. what happens to kinetic energy as the car goes down the hill?
b. what happens to kinetic energy as the car goes up the hill?

a.   mass number from atomic number

the components of a vector are the parts of the vectors that are to each other.

b perpendicular

3. dark matter

empty space could also be a simple vacuum

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.