How can a roller coaster have enough energy for the entire track if a motor is only used to get the cars to the top of the first hill?

Select one:

A. The cars are moving so quickly that their momentum allows them to complete the track

B. The coaster uses only the kinetic energy produced when the cars go down the first hill this provides enough energy to complete the track.

C. The coaster uses conversions between kinetic and potential energies to continue on the tracks

D. The weight of the back cars provide enough force to push all of the cars in front of them forward this motion pulls the back cars as well.

1.aluminum chloride (alcl3), and sodium hydroxide (naoh) can react to form aluminum hydroxide (al(oh)3) and sodium chloride (nacl).    you have 13.4 g of aluminum chloride and 10.0 g of sodium hydroxide. answer the following questions: •what is the balanced equation for this reaction? •if you use all 13.4 g of aluminum chloride, how many grams of aluminum hydroxide can be formed? work must be shown to earn credit •if you use all 10.0 g of sodium hydroxide, how many grams of aluminum hydroxide can be formed? work must be shown to earn credit •how many grams of aluminum hydroxide will actually be made?     which reagent is limiting? explain your answer.

Which liquid (h2o, h2o + soap, or h2o + salt) has the strongest cohesion and adhesion? (need now plz)

Introduction of drugs into the gastrointestinal tract is a form of administration. a. enteral b. topical c. parenteral d. inhalation