A force of 8.00 newtons acts on a block across a horizontal frictionless surface for 12.0 seconds.
The block travels 4.00 meters. What is the change in kinetic energy during these 12.0
seconds?

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

What must be the same for any two resistors that are connected in series ? a. the potntial diffrence across each b. the rate at which charge moves through each c. the rate at which energy is used by each d. the resistance to the flow of charge of each

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?