Charlotte built a simple electromagnet, shown below. She found that the electromagnet picked up the entire pile of paper clips the instant she turned it on. Which of the following might allow Charlotte’s electromagnet to pick up a single paper clip at a time?

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.