30. As the cylinder rolls down the ramp, how do the potential energy of the cylinder-Earth system and the kinetic energy of the cylinder change, if at all? (A)-Potential Energy of Cylinder-Earth System -Kinetic Energy of Cylinder
-Stays the same
-Increases

(B)-Potential Energy of Cylinder-Earth System -Kinetic Energy of Cylinder
-Stays the same
-Decreases

(C)-Potential Energy of Cylinder-Earth System -Kinetic Energy of Cylinder
-Decreases
-Increases

(D)-Potential Energy of Cylinder-Earth System -Kinetic Energy of Cylinder
-Decreases
-Decreases

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Me pl give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.