A 3000kg roller coaster tops a 65m hill with a speed of 3m/s. It then rolls down to a dip 10m off the ground and climbs up to a small hill 20m above the ground. What is its KE and speed at the end?

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Imagine an isolated positive point charge q (many times larger than the charge on a single proton). there is a charged particle a (whose charge is much smaller than charge q) at a distance from the point charge q. on which of the following quantities does the magnitude of the electric field created by charge q at particle a's position depend? check all that apply.the type of the charge on the charged particle athe relative orientation between q and a (while the distance between q and a is fixed)the specific location of the charged particle a (while the distance between q and a is fixed)the amount of the charge on the point charge qthe specific location of the point charge q (while the distance between q and a is fixed)the distance between the point charge q and the charged particle athe amount of the charge on the charged particle a

First to answer will be the brainliest i need the answer asap