I have a roller coaster with a cart that has a mass of 500kg. The cart sits on top of a 100m hill and has an initial velocity of 60 m/s. Will the potential and kinetic energy be equal to each other halfway down the hill at 50m? If not, how do you find the height at which an object will have half of its energy kinetic and the other half potential?

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

Which of the following is an example of units for speed

Waves are used in many practical applications to support work, entertainment, and health. one example is the use of ultrasound imaging to safely track the development of a growing fetus. what is a specific example of a practical application of waves in medicine, entertainment, safety, or other fields? provide a brief explanation of how the properties of waves are useful to that application.