A 1500 kg rollercoaster starts at the top of a frictionless hill with 200,000 J of gravitational potential energy and 50,000 J of kinetic energy. As the rollercoaster reaches the bottom of the hill, it now has 220,000 J of kinetic energy. Calculate the gravitational potential energy of the rollercoaster at the bottom of the hill.

true

explanation:

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.